Question

Solve for x: 5x+7=3x−9.

Answer 1

To solve for x in the given equation;

$5x+7=3x-9$

We start by collecting like terms, as follows;

$5x-3x=-9-7$

When a number crosses the sign of equality, the sign in front of it switches. Positive numbers becomes negative, and vice versa.

We would now have;

$\begin{gathered} 5x-3x=-9-7 \\ 2x=-16 \\ \text{Divide both sides by 2;} \\ \frac{2x}{2}=\frac{-16}{2} \\ x=-8 \end{gathered}$

ANSWER:

The answer is x = -8