Question
$$5a-9 = a+15$$
Answer
$$ a = 6 $$
Explanation
$$ \begin{aligned} 5a-9 &= a+15&& \text{move the $ \color{blue}{ a } $ to the left side and $ \color{blue}{ -9 }$ to the right} \\[1 em]5a-a &= 15+9&& \text{simplify left and right hand side} \\[1 em]4a &= 24&& \text{ divide both sides by $ 4 $ } \\[1 em]a &= \frac{24}{4}&& \\[1 em]a &= 6&& \\[1 em] \end{aligned} $$
This page was created using
Equations Solver