Question

TÌm x

A.-(-3-x+8)-(-3+5)=|5-8|

B.43+(9-21)=317-(x+317)

C.3(x-2)-2(x-4)=-12-2

Answer 1

Tìm x

\(\text{a.-(-3-x+8)-(-3+5)=|5-8| }\)

\(3+x-8+3-5=\)\(\left|-3\right|\)

\(3+x-8+3-5=\)\(3\)

\(x=\)\(\text{3+5-3+8-3}\)

\(\text{x=10}\)

B.\(\text{43+(9-21)=317-(x+317)}\)

\(43+9-21\)\(=317-x-317\)

\(50-21=\left(317-317\right)\)\(-x\)

\(29=0-x\)

\(29=-x\)

\(\Rightarrow x=-29\)

c,3(x-2)-2(x-4)=-12-2

3x -6 -2x -8= -12

(3x-2x) - (6+8) =-14

x-14=-14

x=-14+14

x=0