Question
$$9f\cdot2+5f+7+f\cdot2+f+2 = 0$$
Answer
$$ f = -\dfrac{9}{26} $$
Explanation
$$ \begin{aligned} 9f\cdot2+5f+7+f\cdot2+f+2 &= 0&& \text{simplify left side} \\[1 em]18f+5f+7+3f+2 &= 0&& \\[1 em]23f+7+3f+2 &= 0&& \\[1 em]26f+9 &= 0&& \text{ move the constants to the right } \\[1 em]26f &= -9&& \text{ divide both sides by $ 26 $ } \\[1 em]f &= -\frac{9}{26}&& \\[1 em] \end{aligned} $$
This page was created using
Equations Solver