\(12^2-2^2.\left(518-x\right)=-36\)

\(\Rightarrow144-4.\left(518-x\right)=-36\)

\(\Rightarrow4\left(518-x\right)=180\)

\(\Rightarrow518-x=45\)

\(\Rightarrow x=473\)

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/\(\left(x:12\right)\times7+8=36\)
\(\left(x:12\right)\times7=36-8\)
\(\left(x:12\right)\times7=28\)
\(x:12=28:7\)
\(x:12=4\)
\(x=4\times12\)
\(x=48\)

cái ô vuông kia là dấu gì vậy bạn?

Dau nhan nha

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) \(12^2+\left(518-x\right)=-36\)

\(144+518-x=-36\)

\(662-x=-36\)

\(x=662+36\)

\(x=698\)

vậy \(x=698\)

b) \(2\left(x-5\right)=8\)

\(x-5=4\)

\(x=9\)

vậy \(x=9\)

\(a,12^2+\left(518-x\right)=-36\)

\(\Rightarrow518-x=-36-12^2=-180\)

\(\Rightarrow x=-180-518=-698\)

\(b,2\left(x-5\right)=8\)

\(x-5=8\div2=4\)

\(x=4+5=9\)

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

lộn 12 x 4

= 48

15C 16B

5X + 7 = 122

5X = 115

X = 115 : 5

X = 23

Học tốt

\(x+\dfrac{518}{6}+60=313\\ x+\dfrac{518}{6}=313-60\\ x+\dfrac{518}{6}=253\\ x=253-\dfrac{518}{6}\\ x=\dfrac{1518}{6}-\dfrac{518}{6}\\ x=\dfrac{1000}{6}=\dfrac{500}{3}\)