$$ \begin{aligned} 28+7x &= -8(x+4)&& \text{simplify left and right hand side} \\[1 em]7x+28 &= -(8x+32)&& \\[1 em]7x+28 &= -8x-32&& \text{move the $ \color{blue}{ -8x } $ to the left side and $ \color{blue}{ 28 }$ to the right} \\[1 em]7x+8x &= -32-28&& \text{simplify left and right hand side} \\[1 em]15x &= -60&& \text{ divide both sides by $ 15 $ } \\[1 em]x &= -\frac{60}{15}&& \\[1 em]x &= -4&& \\[1 em] \end{aligned} $$

This page was created using