1.tìm số nguyên x , biết :
(-x+821+534)=499 + (x-84)
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 x, biết
a) -(x-3+85)= ( x+ 70 + 71 ) - 5
b) ( -x+ 821+ 534)=499 + ( x-84 )
điên à ko thấy người ta hỏi à muốn hỏi nữa thì cút
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.
\(a,353-x=46+\left(3x-21\right)\)
\(353-x=138x-25\)
\(-x-138x=-25-353\)
\(-139x=-378\Leftrightarrow x=\frac{378}{139}\)
\(b,-\left(x+81\right)=\left(2x+12\right)-\left(5+x\right)\)
\(-x-81=2x+12-5-x\)
\(-x+x-2x=12-5+81\)
\(-2x=88\Leftrightarrow x=-44\)
tìm x thuộc z : a , { -x = 821 + 534 } = 499 + { x - 84 }
b, - { 754 + x } = { x- 12 - 741 } - 23
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. ( -x + 821+ 534 ) = 499 + ( x - 84 )
b. - (754 + x ) = ( x - 12 - 741 ) - 23
Thực hiện quy tắc chuyển vế:
-x+821+534=499+(x-84)
-x+821+534=499+(x-84)
-> -x +1355 =499-84 + x
-> -x+1355= 415 + x
->2x= 1355-415
->x= 940/2= 470
-> x=470
Bài 1, Tìm x, biết
a) - x + 821 + 534 = 499 + (x - 84)
b) x - 96 = (448 - x) - 150
c) - (754 + x) = (x - 12 - 741) - 23
d) (6 + x) - (17 - 21) = -25
e) 17 - (x+2) = 3
h) -10 - (31 - x) = 40
a) \(-x+821+534=499+\left(x-84\right)\)
\(-x-x=499-84-821-534\)
\(-2x=-940\)
\(x=470\)
b) \(x-96=\left(448-x\right)-150\)
\(x+x=448-150+96\)
\(2x=394\)
\(x=197\)
c) \(-\left(754+x\right)=\left(x-12-741\right)-23\)
\(-754-x=x-12-741-23\)
\(-x+x=-12-741-23+754\)
\(0x=2\)
\(x\)ko tồn tại
d) \(\left(6+x\right)-\left(17-21\right)=-25\)
\(6+x-17+21=-25\)
\(x=-25-6+17-21\)
\(x=-35\)
e) \(17-\left(x+2\right)=3\)
\(17-x-2=3\)
\(-x=3-17+2\)
\(-x=-12\)
\(x=12\)
h) \(-10-\left(31-x\right)=40\)
\(-10-31+x=40\)
\(x=40+10+31\)
\(x=81\)
k mk nha bạn
Nguyễn Thành Đănga) - x + 821 + 534 = 499 + ( x - 84 )
<=> -x + 821 + 534 = 499 + x - 84
<=> 2x = 940
<=> x = 470
b, x - 96 = ( 448 - x ) - 150
<=> x - 96 = 448 - x - 150
<=> 2x = 394
<=> x = 157
Cac phan con lai tuong tu
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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