Question
$$20\cdot9 = 22x$$
Answer
$$ x = \dfrac{90}{11} $$
Explanation
$$ \begin{aligned} 20\cdot9 &= 22x&& \text{move the $ \color{blue}{ 22x } $ to the left side} \\[1 em]180-22x &= 0&& \text{ move the constants to the right } \\[1 em]-22x &= -180&& \text{ divide both sides by $ -22 $ } \\[1 em]x &= \frac{-180}{-22}&& \\[1 em]x &= \frac{90}{11}&& \\[1 em] \end{aligned} $$
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