Question

9x+15=20-x
Solving linear equations with variable in both sides.

Answer 1

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$\: \: \: \: \: \: \: \: 9x + 15 = 20 - x \\ => 9x + x = 20 - 15 \\ => 10x = 5 \\ => x = \frac{5}{10} \\ => x = \frac{1}{2}$

Answer 2

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$$\begin{lgathered}\: \: \: \: \: \: \: \: 9x + 15 = 20 - x \\ => 9x + x = 20 - 15 \\ => 10x = 5 \\ => x = \frac{5}{10} \\ => x = \frac{1}{2}\end{lgathered}$$