$$7x\cdot3-13x\cdot2 = 2x$$
Answer
$$ x = 0 $$
Explanation
$$ \begin{aligned} 7x\cdot3-13x\cdot2 &= 2x&& \text{simplify left side} \\[1 em]21x-26x &= 2x&& \\[1 em]-5x &= 2x&& \text{move the $ \color{blue}{ 2x } $ to the left side} \\[1 em]-5x-2x &= 0&& \text{simplify left side} \\[1 em]-7x &= 0&& \text{ divide both sides by $ -7 $ } \\[1 em]x &= \frac{0}{-7}&& \\[1 em]x &= 0&& \\[1 em] \end{aligned} $$
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