Question

(x-12)-15=(20-7)-(18+x)

Answer 1

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Answer 2

\(\left(x-12\right)-15=\left(20-7\right)-\left(18+x\right)\)

\(\Rightarrow x-12-15=13-18-x\)

\(\Rightarrow x-27=-5-x\)

\(\Rightarrow x+x=27-5\)

\(\Rightarrow2x=22\)

\(\Rightarrow x=\frac{22}{2}\)

\(\Rightarrow x=11\)