122+ (518-x)=-36
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\(12^2-2^2.\left(518-x\right)=-36\)
\(\Rightarrow144-4.\left(518-x\right)=-36\)
\(\Rightarrow4\left(518-x\right)=180\)
\(\Rightarrow518-x=45\)
\(\Rightarrow x=473\)
Vậy \(x=473\)
\(2\left|x-5\right|=8\)
\(\Rightarrow\left|x-5\right|=4\)
\(\Rightarrow x-5=4\) hoặc \(x-5=-4\)
+) \(x-5=4\Rightarrow x=9\)
+) \(x-5=-4\Rightarrow x=1\)
Vậy \(x\in\left\{9;1\right\}\)
a/\(x\times5+122+236=633\)
\(x\times5=633-236-122\)
\(x\times5=275\)
\(x=275:5\)
\(x=55\)
b/\(\left(x:12\right)\times7+8=36\)
\(\left(x:12\right)\times7=36-8\)
\(\left(x:12\right)\times7=28\)
\(x:12=28:7\)
\(x:12=4\)
\(x=4\times12\)
\(x=48\)
a) 122 + ( 518 - x ) = -36
144 + ( 518 - x ) = -36
158 - x = -36 - 144
158 - x = -180
x = 158 - (-180)
x = 338
b) 2 ( x - 5 ) = 8
x - 5 = 8 : 2
x - 5 = 4
x = 4 + 5
x = 9
a, 3x X +122=21
\(3xX=21-122\)
\(3xX=-101\)
\(X=-101:3\)
\(X=-\frac{101}{3}\)
b,(36-X):2=10
\(36-X=10x2\)
\(36-X=20\)
\(X=36-20\)
\(X=16\)
c, 36-X:2 = 10
\(36-X:2=10\)
\(X:2=36-10\)
\(X:2=26\)
\(X=26x2\)
\(X=52\)
a.3xX+122=21
3xX =21-122
3xX =-101
X =-101:3
X =\(\frac{-101}{3}\)
x . 5 + 122 + 236 = 633
x . 5 + 358 = 633
x . 5 = 633 - 358
x . 5 = 275
x = 275 : 5
x = 55
b) (x : 12) . 7 + 8 = 36
(x : 12) . 7 = 36 - 8
(x : 12) . 7 = 28
x : 12 = 28 : 7
x : 12 = 4
x = 4 . 12
x = 48
#Học tốt!!!
X x 5 + 122 + 236 = 633
X x 5 + 122 = 633 - 236
X x 5 + 122 = 397
X x 5 = 397 - 122
X x 5 = 275
X = 275 : 5
X = 55
(X : 12) x 7 + 8 = 36
(X : 12) x 7 = 36 - 8
(X : 12) x 7 = 28
X : 12 = 28 : 7
X : 12 = 4
X = 12 : 4
X = 3
\(x+\dfrac{518}{6}+60=313\\ x+\dfrac{518}{6}=313-60\\ x+\dfrac{518}{6}=253\\ x=253-\dfrac{518}{6}\\ x=\dfrac{1518}{6}-\dfrac{518}{6}\\ x=\dfrac{1000}{6}=\dfrac{500}{3}\)
122 +(518-x)= -36
144 +( 518- x) = -36
518 - x =(-36) - 144
518 - x= -180
x=518 - (-180)
x=698