how do you solve it and how do you explain?

Answer:
so the answer is 30
now to find the answer we just need to do this...
step 1: we need to simplify the equations from both sides.
[tex]\frac{-2}{5} x = -12[/tex]
then we multiply on both sides by [tex]\frac{5}{-2}[/tex]
[tex](\frac{5}{-2}) *(\frac{-2}{5}x )= (\frac{5}{-2} )*(-12)[/tex]
which equals x= 30
Step-by-step explanation:
hope this helps!!