y = -4/9x-3
y = -7/5x-3
-4/9x-3 = -7/5x-3
-4(5x-3) = -7(9x-3)
-20x + 12 = -63x + 21
-20x + 63x = 21 - 12
43x = 9
43x/43 = 9/43
x = 9/43
y = -4/9x-3
y = -4/9(9/43) - 3
y = -4/(81/43-3)
y = -4 / (81-129/43)
y = -4 / -48/43
y = -4 * 43/-48
y = -172/-48
y = 3 28/48 or 3 7/12
