3(7 - 9x) - 5(5x + 1) = -8(9x - 4)
distribute on both sides:
21 - 27x - 25x - 5 = -72x + 32
combine terms on the left:
16 - 52x = -72x + 32
add 52x to both sides:
16 = -20x + 32
subtract 32 from both sides:
-16 = -20x
divide both sides by -20:
x = -16/-20 = 4/5