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
[tex]\begin{gathered} 6x+6=90 \\ 6(3)+6=90 \\ 24\neq90 \end{gathered}[/tex]Option B
[tex]\begin{gathered} 3x-2=7 \\ 3(3)-2=7 \\ 9-2=7 \\ 7=7 \end{gathered}[/tex]Since this holds, the correct equation is Option B.
