Tìm số nguyên x, biết:
a) 353-x=46+(3x-21). b) -(x+81)=(2x+12)-(5+x).
c) (-x+821+534)=499+(x-84). d) x+53=(400-9x)-447.
tìm số nguyên x, biết:
a) 353-x=46+(3x-21)
b) -(x+81)=(2x+12)-(5+x)
c)-x+821+534=499+(x-84)
d) x+53=(400-9x)-447
Tìm số nguyên x biết:
a) x-96=(443-x)-15
b) (x-12)-15=(20-7)-(18-x)
c) 353-x=46+(3x-21)
d) -(x+81)=(2x+12)-(5+x)
e) (-x+821+534)=499+(x-84)
g) x+53= (400-9x)-447
a, x - 96 = ( 443 - x ) - 15
x - 96 = 443 - x - 15
x - 96 = 428 - x
x + x = 428 + 96
2x = 524
x = 262
b, ( x - 12 ) - 15 = ( 20 - 7 ) - ( 18 - x )
x - 12 - 15 = 13 - 18 + x
x - 27 = - 5 + x
x - x = - 5 + 27
0x = 22
=> ko có giá trị nào thõa mãn
c, 353 - x = 46 + ( 3x - 21 )
353 - x = 46 + 3x - 21
353 - x = 25 + 3x
- x - 3x = 25 - 353
- 4x = - 328
x = 82
d, - ( x + 81 ) = ( 2x +12 ) - ( 5 + x )
- x - 81 = 2x + 12 - 5 - x
- x - 81 = x + 7
- x - x = 7 + 81
- 2x = 88
x = - 44
e, ( - x + 821 + 534 ) = 499 + ( x - 84 )
- x + 1355 = 499 + x - 84
- x - x = 499 - 84 - 1355
- 2x = - 940
x = 470
g, x + 53 = ( 400 - 9x ) - 447
x + 53 = 400 - 9x - 447
x + 53 = - 47 - 9x
x + 9x = - 47 - 53
10x = -100
x = - 10
Tìm x thuộc Z:
a) 311 - x + 82 = 46 + ( x -21 )
b) - ( x - 3 + 85 ) = ( x + 70 - 71 ) - 5
c) ( -x + 821 + 534 ) = 499 + ( x - 84 )
d) x + 96 = ( 443 - x ) - 447
a) 311 - x + 82 = 46 + (x - 21)
311 - x + 82 = 46 + x - 21
-x - x = 46 - 21 - 311 - 82
-2x = -368
x = -368 : (-2)
x = 184
b) -(x - 3 + 85) = (x + 70 - 71) - 5
-x + 3 - 85 = x + 70 - 71 - 5
-x - x = 70 - 71 - 5 - 2 + 85
-2x = 77
tìm x ho mình với( mỗi caai 2 tích , trình bày đầy đủ)
a) 311-x+82=46+(x-21)
b) -(x-3+85)=(x+70-71)-5
c)(-x+821+534)=499+(x-84)
d)x+96=(443-x)-447
e)(x-12)-15)=(20-7)-(18+x)
311-x+82=46+(x-21)
-(x-3+85)=(x+70-71)-5
(-x+821+534)=499+(X-84)
x+96=(443-x)-447
\(1.311-x+82=46+\left(x-21\right)\\ 311+82-x=46-21+x\\ 393-x=25+x\\ 393-x-25-x=0\\ 393-25-x-x=0\\ 368-2x=0\\ \Rightarrow-2x=368\\ x=368:\left(-2\right)\\ x=-184\)
\(2.-\left(x-3+85\right)=\left(x+70-71\right)-5\\ -x+3-85=x+70-71-5\\ -x-82=x-6\\ -x-82-x+6=0\\ -2x-76=0\\ -2x=76\\ x=76:\left(-2\right)\\ x=-38\)
\(3.\left(-x+821+534\right)=499+\left(x-84\right)\\ -x+821+534=499+x-84\\ -x+1355=x+415\\ -x+1355-x-415=0\\ -2x+940=0\\ -2x=-940\\ x=-940:\left(-2\right)\\ x=470\)
\(4.x+96=\left(443-x\right)-447\\x+96=443-x-447\\ x+96=-x-4\\ x+96+x+4=0\\ 2x+100=0\\ 2x=-100\\ x=-100:2\\ x=-50 \)
Bài 1:Tìm x , biết :
a, (x-12) -15 = (20-7) - (18+x)
b, x- 96 = ( 443 - x) - 15
c, 311 - x + 82 = 46 + ( x- 21)
d, - ( x - 3 + 85) = ( x + 70 - 71) -5
e, ( - x + 821 + 534 ) = 499 + ( x-84)
f, x + 96 = ( 443 - x) - 447
a, (x-12) -15 = (20-7) - (18+x)
<=> x - 12 - 15 = 13 - 18 - x
<=> 2x = 22
<=> x = 11
b, x- 96 = ( 443 - x) - 15
<=> x - 96 = 443 - x - 15
<=> 2x = 524
<=> x = 262
c, 311 - x + 82 = 46 + ( x- 21)
<=> 311 - x + 82 = 46 + x - 21
<=> 2x = 368
<=> x = 184
e, ( - x + 821 + 534 ) = 499 + ( x-84)
<=> - x + 821 + 534 = 499 + x - 84
<=> 2x = 940
<=> x = 470
f, x + 96 = ( 443 - x) - 447
<=> x + 96 = 443 - x - 447
<=> 2x = - 100
<=> x = - 50
d, - ( x - 3 + 85) = ( x + 70 - 71) -5
<=> - x + 3 - 85 = x + 70 - 71 - 5
<=> 2x = - 76
<=> x = - 38
Tìm x:
a) 311 - x + 82 =46 + (x-21)
b) (-x + 821 + 534) = 499 + (x - 84)
c) -(x -3 + 85) =( x + 70 -71 ) - 5
LÀM NHANH GÚP MK NHA
\(311-x+82=46\left(x-21\right)\)
<=> \(311+82-46+21=x+x\)
<=> \(2x=368\)
<=> \(x=184\)
\(-x+821+534=499+x-84\)
<=> \(-x-x=499-84-821-534\)
<=> \(-2x=-940\)
<=> \(x=470\)
\(-\left(x-3+85\right)=x+70-71-5\)
<=> \(-x+3-85=x-6\)
<=> \(-x-x=-6-3+85\)
<=> \(-2x=76\)
<=> \(x=-38\)
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Tìm x yhuoocj Z biết:
a) x-96=(443-x)-15
b) (x-12)-15=(20-7)-(18+x)
c) 311-x+82=46+(x-21)
d) -(x-3+85)=(x+70-71)-5
e) (-x+821+534)=499+(x-84)
f) x+96=(443-x)
a) x - 96 = (443 - x) - 15
x - 96 = 443 - x - 15
x + x = 443 -15 + 96
2x = 524
x = 524 : 2
x = 262
b) (x -12) - 15 = (20 - 7) - (18 + x)
x - 12 - 15 = 20 - 7 - 18 - x
x + x = 20 - 7 - 18 + 12 + 15
2x = 22
x = 22 : 2
x = 11
c) 311 - x + 82 = 46 + (x - 21)
311 - x + 82 = 46 + x - 21
-x - x = 46 - 21 - 311 - 81
-2x = -367
x = -367 : (-2)
x = 183,5
d) -(x - 3 + 85) = (x + 70 - 71) - 5
-x + 3 - 85 = x + 70 - 71 - 5
-x - x = 70 - 71 - 5 - 3 + 85
-2x = 76
x = 76 : (-2)
x = -38
e,f làm tương tự
a) x - 96 = (443 - x) - 15
x - 96 = 443 - x - 15
x + x = 443 -15 + 96
2x = 524
x = 524 : 2
x = 262
b) (x -12) - 15 = (20 - 7) - (18 + x)
x - 12 - 15 = 20 - 7 - 18 - x
x + x = 20 - 7 - 18 + 12 + 15
2x = 22
x = 22 : 2
x = 11
c) 311 - x + 82 = 46 + (x - 21)
311 - x + 82 = 46 + x - 21
-x - x = 46 - 21 - 311 - 81
-2x = -367
x = -367 : (-2)
x = 183,5
d) -(x - 3 + 85) = (x + 70 - 71) - 5
-x + 3 - 85 = x + 70 - 71 - 5
-x - x = 70 - 71 - 5 - 3 + 85
-2x = 76
x = 76 : (-2)
x = -38
e,f làm tương tự
a) x - 96 = (443 - x) - 15
x - 96 = 443 - x - 15
x + x = 443 -15 + 96
2x = 524
x = 524 : 2
x = 262
b) (x -12) - 15 = (20 - 7) - (18 + x)
x - 12 - 15 = 20 - 7 - 18 - x
x + x = 20 - 7 - 18 + 12 + 15
2x = 22
x = 22 : 2
x = 11
c) 311 - x + 82 = 46 + (x - 21)
311 - x + 82 = 46 + x - 21
-x - x = 46 - 21 - 311 - 81
-2x = -367
x = -367 : (-2)
x = 183,5
d) -(x - 3 + 85) = (x + 70 - 71) - 5
-x + 3 - 85 = x + 70 - 71 - 5
-x - x = 70 - 71 - 5 - 3 + 85
-2x = 76
x = 76 : (-2)
x = -38
e,f làm tương tự
a)311-x+82=46+(x-21) b) -(x-3+85)=(x+70-71)-5
c)(-x+821+534)=499+(x-84) c)x+96=(443-x)-447
a) 311 - x + 82 = 46 + (x - 21)
=> 393 - x = 25 + x
=> 393 - 25 = x + x
=> 368 = 2x
=>x = 368 : 2
=> x = 184
b) -(x - 3 + 85) = (x + 70 - 71) - 5
=> -x + 3 - 85 = x + 70 - 71 - 5
=> -x - 82 = x - 6
=> -x -x = 6 + 82
=> -2x = 88
=> x = 88 : (-2)
=> x = -44
\(311-x+82=46+\left(x-21\right)\)
\(393-x=36+x-21\)
\(393-36+21=2x\)
\(x=139\)
a)311-x+82=46+(x-21)
311 - x + 82 = 46 + x - 21
-x - x = 46 - 21 - 311 - 82
-2x = -368
x = 184
b) -(x-3+85)=(x+70-71)-5
- x + 3 - 85 = x + 70 - 71 - 5
- x - x = 70 - 71 - 5 + 85 - 3
-2x = 76
x = -38
c)(-x+821+534)=499+(x-84)
- x + 821 + 534 = 499 + x - 84
- x - x = 499 - 84 - 534 - 821
-2x = -940
x = 470
c)x+96=(443-x)-447
x + 96 = 443 - x - 447
x + x = 443 - 447 - 96
2x = -100
x = -50