GMAT Math Practice Test #1

Answer E

This is a problem of solving two linear equations with two variables. From the second equation x+2=0 , you get value of one variable x = -2. Put this value of x in the first equation to get the value of second variable

8x+6y = -4.
-16 +6y = -4
6y =12 or y = 2

Key takeaway: The normal way is to go for solving the two linear equations by the standard method and find the two variables. But that may be a longer rout. So always first look for any other way to attack such problems say finding one variable .