$$ \begin{aligned} 19x-90 &= 47x+56&& \text{move the $ \color{blue}{ 47x } $ to the left side and $ \color{blue}{ -90 }$ to the right} \\[1 em]19x-47x &= 56+90&& \text{simplify left and right hand side} \\[1 em]-28x &= 146&& \text{ divide both sides by $ -28 $ } \\[1 em]x &= -\frac{146}{28}&& \\[1 em]x &= -\frac{73}{14}&& \\[1 em] \end{aligned} $$

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