Question
$$x\cdot38-17+35 = 816$$
Answer
$$ x = 21 $$
Explanation
$$ \begin{aligned} x\cdot38-17+35 &= 816&& \text{simplify left side} \\[1 em]x\cdot38-17+35 &= 816&& \\[1 em]38x+18 &= 816&& \text{ move 18 to the right } \\[1 em]38x &= 816-18&& \\[1 em]38x &= 798&& \text{ divide both sides by $ 38 $ } \\[1 em]x &= \frac{798}{38}&& \\[1 em]x &= 21&& \\[1 em] \end{aligned} $$
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