7y-3x=-27 and 4x-y-11=0
Using the second equation, we can write it as y = 4x - 11 .....and substituting this in for "y" in the frist equation, we have
7(4x - 11) - 3x = -27
28x - 77 - 3x = -27
25x - 77 = -27 add 77 to both sides
25x = 50 divide both sides by 2
x = 2 and y = 4(2) - 11 = 8 - 11 = -3
So (x, y) = (2, -3)
7y-3x=-27 and 4x-y-11=0
Using the second equation, we can write it as y = 4x - 11 .....and substituting this in for "y" in the frist equation, we have
7(4x - 11) - 3x = -27
28x - 77 - 3x = -27
25x - 77 = -27 add 77 to both sides
25x = 50 divide both sides by 2
x = 2 and y = 4(2) - 11 = 8 - 11 = -3
So (x, y) = (2, -3)