Question

What is the solution of 4(x - 10) = -3x - 12?

Answer 1

$4(x-10)=-3x-12$

first solve the parenthesis

$4x-40=-3x-12$

then, place the x's on the same side and the other numbers on the other side

$\begin{gathered} 4x+3x=-12+40 \\ \end{gathered}$

do the operations

$7x=28$

solve x

$\begin{gathered} x=\frac{28}{7} \\ \\ x=4 \end{gathered}$

the value of x is 4

you can check the solution replacing x on the initial expression

$4((4)-10)=-3(4)-12$

and solve each side

$\begin{gathered} 4(-6)=-12-12 \\ -24=-24 \end{gathered}$

the equality is right