$$ \begin{aligned} 3x+8 &= 5(4x+5)&& \text{simplify right side} \\[1 em]3x+8 &= 20x+25&& \text{move the $ \color{blue}{ 20x } $ to the left side and $ \color{blue}{ 8 }$ to the right} \\[1 em]3x-20x &= 25-8&& \text{simplify left and right hand side} \\[1 em]-17x &= 17&& \text{ divide both sides by $ -17 $ } \\[1 em]x &= -\frac{17}{17}&& \\[1 em]x &= -1&& \\[1 em] \end{aligned} $$

This page was created using