[tex]\huge\textbf{Use the distributive property.}[/tex]
[tex]\begin{aligned}A.&&3(x+2)&=18\\ B.&&3x+6&=18 \end{aligned}[/tex]
You can use the distributive property to get equation B from equation A.
The distributive property proves that [tex]a(b+c)=ab+ac[/tex]. Use this same logic on equation A, distributing [tex]3[/tex] to [tex](x+2)[/tex].
[tex]\begin{aligned}3(x+2)&=18\\3x+3(2)&=18\\3x+6&=18\end{aligned}[/tex]
