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-6 = 2x
-3 = x
x + 4 = -3 + 4 = 1
2q + 6 + 3q - 4 = 9
5q = 7
q = 7/5 = 1 2/5
3 - 3q + 4q - 20 = -5
q = 12
4x + 3x - 6 - 5 + 4x = 0
11x = 11
x = 1
6x - 9 -2x - 2 = x - 3
3x = 8
x = 8/3 = 2 2/3
8y - 10y + 15 = 4y - 12 + 18
9 = 2y
9/2 = y
4 1/2 = y
10 y + 20 - 10y + 16 = 6 - 4y
4y = -30
y = -30/4 = - 7 2/4 = - 7 1/2