Question

Verona is solving the equation -3+4x=9. In order to isolate the variable term using the subtraction property of equality, which number should she subtract from both sides of the equation. A: -4B: -3C: 3D: 4

Answer 1

In order to solve the equation, we should do:

$\begin{gathered} -3+4x=9 \\ -3+4x+3=9+3 \\ 4x=12 \\ x=\frac{12}{4} \\ x=3 \end{gathered}$

Then, in the step to isolate the variable term (4x), we should add 3 to both sides of the equality (see step 2).

Answer: C: 3.