X + 2y = 6 x - 4y = 8 2y - 6 = 4y + 8 6 - 2y = -4y + 8 6 - 2y = 4y + 8

step-by-step explanation:

step 1: solve one of the equations for one of the variables. let's solve the first equation for y:

step 2: substitute that equation into the other equation, and solve for x.

step 3: substitute x = 4 x = 4 x=4 into one of the original equations, and solve for y.