So all you need to do for checking is replace the x value. So for question 11 you would take -4 and replace it with all the x's in the original equation so it would be 3/4(-4)=1/4(-4)-2
Do the same for question 12 the new equation would be 5/8(32)=1/2(32)+4
Once you answered both equations if the numbers on both side of the equal sign are the same thats how you know that the answer is correct!
Let me know if you need help and I will help you through solving each equation.
Hope this helps! Good luck!
