Question

what is a solution?What was the solution to this equation?how many solutions did the equation have?

Answer 1

We have

$3x+7=11x+15$

We subtract 11x on both sides and 7 on both sides

$3x-11x+7-7=11x-11x+15-7$

we sum like terms

$\begin{gathered} 3x-11x=15-7 \\ -8x=8 \\ \end{gathered}$

Then we isolate the x

$x=-\frac{8}{8}=-1$

ANSWER

x=-1

The equation only have one solution