I am doing a practice ( it counts for 0% ) and I am so confused on how to do this problem, I have looked and gone over my book so many times. Will someone help explain it to me?

Question

anonymous · Answer

attachment

campbell_st · Answer

well you need to know the diagonals bisect each other.... that's a property of a parallelogram 

so 

QT = TS    or   x + 2 = y  Equation 1

and 

PT = TR    or 2x = y + 4  Equation 2

so substitute equation 1 into equation 2 and solve for x. 

then when you get x, substitute it into equation 1 to find y. 

hope it helps

anonymous · Answer

I understood that they equaled each other, I just don't understand how to substitute them together