Question
$$15-10x\cdot2+17 = 0$$
Answer
$$ x = \dfrac{8}{5} $$
Explanation
$$ \begin{aligned} 15-10x\cdot2+17 &= 0&& \text{simplify left side} \\[1 em]15-20x+17 &= 0&& \\[1 em]-20x+32 &= 0&& \text{ move the constants to the right } \\[1 em]-20x &= -32&& \text{ divide both sides by $ -20 $ } \\[1 em]x &= \frac{-32}{-20}&& \\[1 em]x &= \frac{8}{5}&& \\[1 em] \end{aligned} $$
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