made a mistake in the problem:
-7(11-4w)-15w = -27 -(50-13w)
-7(11-4w)-15w = -27 -(50-13w)
-77 + 28w - 15w = -27 - 50 + 13w
-77 + 13w = -77 + 13w
0 = 0
-7(11-4w)-15w = -27 -(50-13w)
-77 + 28w - 15w = -27 - 50 + 13w
-77 + 13w = -77 + 13w
0 = 0