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1. Identify two sides of the equation

1. 3x-7 =15
2. 5(2x-6) = x +4

Dear Student,

Your question is not clear as what is two sides of the equation here.

However if the question is to find value of x, then below is the answer


$$\begin{gathered} 1) \\ 3x-7=15 \\ \Rightarrow 3x=7+15 \\ \Rightarrow 3x=22 \\ \Rightarrow x=\frac{22}{3} \\ 2) \\ 5\left(2x-6\right)=x+4 \\ \Rightarrow 10x-30=x+4 \\ \Rightarrow 10x-x=4+30 \\ \Rightarrow 9x=34 \\ \Rightarrow x=\frac{34}{9} \end{gathered}$$
Regards,