since there is already 2 7x's we can multiply a positive 1 so we can eliminate the 7x's
+1 (-7x-4y=-7) = 7x+4y=7
7x+4y=7
-7x-2y=-4
2y=3
divide 2 on both sides to isolate y
y=2/3
now to find x you will have to plug in 2/3 to one of the original equations
-7x-2(2/3)=-4
-7x-1.33=-4
add 1.33 to both sides
-7x=2.67
divide -7 on both sides
x=0.38
hope this helped hon:)
