Question 320147
2x-y=1 ___ multiplying by 2 ___ 4x - 2y = 2
4x+2y=7


adding equations to eliminate y's ___ (4x - 2y) + (4x + 2y) = 2 + 7 ___ 8x = 9 ___ x = 9/8


substituting to find y ___ 2(9/8) - y = 1 ___ (9/4) - 1 = y ___ 5/4 = y