Question

which equation has the solution x=3 A.6x+6=90 B. 3x-2=7 C. 5x+8=14 D. 2x+6=-12

Answer 1

Answer:

B. 3x-2=7

Explanation:

To determine the equation that has the solution x=3, we substitute x=3 in each option and pick that which is true.

Option A

$\begin{gathered} 6x+6=90 \\ 6(3)+6=90 \\ 24\neq90 \end{gathered}$

Option B

$\begin{gathered} 3x-2=7 \\ 3(3)-2=7 \\ 9-2=7 \\ 7=7 \end{gathered}$

Since this holds, the correct equation is Option B.