Answer
Plug in the variables and check if the equation is equal.
Work Step by Step
Plug in the variable that you solved for to see if the equation is true. For example, if you came to the answer x=5. Plug it in and see. For example 3x=15. So 3(5)=15 and it is correct. But if the original equation was 3x=20 you could check and see that x can't equal 5 and be correct.