TIM SO NGUYEN x , BIET :
a) 3636 : ( 12x - 91) = 36 b) ( x : 23 + 45 ) . 67 = 8911
c) ( 19x + 2.52 ) : 14 = ( 13 - 8 ) 2 - 4 d) -12 . ( x- 5 ) + 7(3 -x ) = 5
Những câu hỏi liên quan
Bài 5.Tìm x N, sao cho:a)3636 : (12x –91) 36b)(x : 23 + 45) . 67 8911c)[(6x –39) : 7]. 4 12d)(3x –24). 73 2. 74e)x(x –10) 0f)(x+ 1). (x –2) 0g)(9 –x)3 64h)3x 81i)2 . 3x 10 . 312+ 8 . 312j)(19x + 2.52) : 14 (13 -8)2-42
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Bài 5.Tìm x N, sao cho:
a)3636 : (12x –91) = 36
b)(x : 23 + 45) . 67 = 8911
c)[(6x –39) : 7]. 4 = 12
d)(3x –24). 73= 2. 74
e)x(x –10) = 0
f)(x+ 1). (x –2) = 0
g)(9 –x)3= 64
h)3x= 81
i)2 . 3x= 10 . 312+ 8 . 312
j)(19x + 2.52) : 14 = (13 -8)2-42
\(a,\Rightarrow12x-91=101\\ \Rightarrow12x=192\\ \Rightarrow x=16\\ b,\Rightarrow x:23+45=133\\ \Rightarrow x:23=88\\ \Rightarrow x=\dfrac{88}{23}\\ c,\Rightarrow\left(6x-39\right):7=3\\ \Rightarrow6x-39=21\\ \Rightarrow6x=60\\ \Rightarrow x=10\\ d,\Rightarrow3x-24=\dfrac{148}{73}\\ \Rightarrow3x=\dfrac{1900}{73}\\ \Rightarrow x=\dfrac{1900}{219}\\ e,\Rightarrow\left[{}\begin{matrix}x=0\\x=10\end{matrix}\right.\\ f,\Rightarrow\left[{}\begin{matrix}x=-1\\x=2\end{matrix}\right.\\ d,\left(9-x\right)^3=64=4^3\\ \Rightarrow9-x=4\\ \Rightarrow x=5\\ h,\Rightarrow x=27\\ i,\Rightarrow6x=312\cdot12=624\cdot6\\ \Rightarrow x=624\\ j,\Rightarrow\left(19x+104\right):14=25-42=-17\\ \Rightarrow19x+104=-238\\ \Rightarrow19x=-342\\ \Rightarrow x=-18\)
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3636: ( 12x-91) = 36
( x : 23 + 45 ) x 67 = 8911
( 19x + 2x 52 ) : 14 = ( 113 - 8 ) 2 - 42
3636: ( 12x-91) = 36
12x-91 =3636:36
12x-91 =101
12x =101+91
12x =192
x =192:12
x =16
( x : 23 + 45 ) x 67 = 8911
x : 23 + 45 =8911:67
x : 23 + 45 =133
x:23 =133-45
x:23 =88
x =88x23
x =2024
bạn tự suy nghĩ nhé,mik bận học rùi
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BÀI 5: Tim x biết:
a) 3636:(12x-91) =36
b) (x : 23+45).67=8911
c) 420+65.4 =(x+175):5+30
d) (32.15):2=(x+70):14-10
e)x-4867=(175.2-50.70):25+23
a) 3636:(12x-91) =36
12x-91 = 3636:36
12x-91=101
12x=101+91
12x=192
x=192:12
x=16
b) (x : 23+45).67=8911
(x : 23+45)=8911:67
(x : 23+45)=133
x:23=133-45
x:23=88
x=88.23
x=2024
c) 420+65.4 =(x+175):5+30
420+260=(x+175):5+30
680=(x+175):5+30
(x+175):5=680-30
(x+175):5=650
(x+175)=650x5
(x+175)=3250
x=3250-175
x=3075
d) (32.15):2=(x+70):14-10
480:2=(x+70):14-10
240=(x+70):14-10
(x+70):14=240+10
(x+70):14=250
(x+70)=250.14
(x+70)=3500
x=3500-70
x=3430
e)x-4867=(175.2-50.70):25+23
x-4867=(350-3500):25+23
x-4867=-3150:25+23
x-4867=-126+23
x-4867=-103
x=-103+4867
x=4764
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BÀI 5: Tim x biết:
a) 3636:(12x-91) =36
b) (x : 23+45).67=8911
c) 420+65.4 =(x+175):5+30
d) (32.15):2=(x+70):14-10
e)x-4867=(175.2-50.70):25+23
tim x biet
c)3636:(42*x-91)=36
d)(x:23+45)*67=8911
a) (x + 74) - 318 = 200
b) 3636 : (12 . x - 91) = 36
c) (x : 26 + 45) . 67 = 8911
d) 720 : [41 - (2x + 5)] = 8 . 5
e) 128 - 3 . (x + 4) = 23
f) (5 . x +4) - 1 = 13
g) (4x - 8) - 3 = 5
a, ( x + 74 ) - 318 = 200
b, 3636 : ( 12x - 91 ) = 36
c, ( x : 23 + 45 ) . 67 = 8911
a) (x + 74) - 318 = 200
x + 74 = 200 + 318
x + 74 = 518
x = 518 - 74
x = 444
b) 3636 : (12x - 91) = 36
12x - 91 = 3636 : 36
12x - 91 = 101
12x = 101 + 91
12x = 192
x = 192 : 12
x = 16
c) (x : 23 + 45) . 67 = 8911
x : 23 + 45 = 8911 : 67
x : 23 + 45 = 133
x : 23 = 133 - 45
x : 23 = 88
x = 88 . 23
x = 2024
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a. ( x + 74 ) - 318 = 200
x + 74 = 518
x = 444
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3636:(12x -91)=36
( x:23+45 ) ×67= 8911
a/ \(3636\div\left(12x-91\right)=36\)
\(12x-91=3636\div36\)
\(12x-91=101\)
\(12x=101+91\)
\(12x=192\)
\(x=192\div12\)
\(x=16\)
b/ \(\left(x\div23+45\right)\times67=8911\)
\(x\div23+45=8911\div67\)
\(x\div23+45=133\)
\(x\div23=133+45\)
\(x\div23=178\)
\(x=178\times23\)
\(x=4094\)
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tìm x biết :
a , ( x + 74 ) -318 =200
b , 3636 : ( 12x - 91 ) = 36
c , ( x : 23 + 45 ) . 67 = 8911
\(a,\left(x+74\right)-318=200\)
\(\left(x+74\right)=200+318\)
\(\left(x+74\right)=518\)
\(x=518-74\)
\(x=444\)
\(b,3636:\left(12x-91\right)=36\)
\(\left(12x-91\right)=3636:36\)
\(\left(12x-91\right)=101\)
\(12x=101+91\)
\(12x=192\)
\(x=192:12\)
\(x=16\)
\(\left(x:23+45\right).67=8911\)
\(\left(x:23+45\right)=8911:67\)
\(\left(x:23+45\right)=133\)
\(x:23=133-45\)
\(x:23=88\)
\(x=88.23\)
\(x=2024\)
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Mk ko ghi lại đề mà làm tiếp luôn nha!
a) (ĐỀ)
x+74=200+318
x+74=518
x =518-74
x =444
b) (ĐỀ)
12x-91=3636:36
12x-91=101
12x =101+91
12x = 192
x = 192:12
x = 16
c) (ĐỀ)
x:23+45=8911:67
x:23+45= 133
x:23 =133-45
x:23 = 88
x = 88.23
x = 2024
K cho mk nha bn!
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a ) (x+74 ) - 218 = 200 \(\Leftrightarrow\) x+74-218 = 200 \(\Leftrightarrow\) x= 200+218+74 \(\Leftrightarrow\) x= 492 vậy x = 492 b, 3636 : ( 12x -91) =36 \(\Leftrightarrow\)12x-91 = 3636: 36 \(\Leftrightarrow\)12x-91 = 101 \(\Leftrightarrow\) 12x = 101+91 \(\Leftrightarrow\) 12x = 192 \(\Leftrightarrow\) x= 16 vậy x = 16
c, ( x : 3 +45 ) . 67 = 8911 \(\Leftrightarrow\) x : 3 +45 = 8911: 67 \(\Leftrightarrow\) x : 3 = 133 - 45 \(\Leftrightarrow\) x : 3 = 88 \(\Leftrightarrow\) x= 88 . 3 \(\Leftrightarrow\) x=264
vậy x= 264
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