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-41 - 1 = 10X - 4X
-42 = 6X
-7 = X
X + 12
-7 + 12
5
-10x + 1 -10x + 1 +
-6x = 42
-6x / -6 = 42 / -6
x = -7
x + 12 = -7 + 12
x + 12 = 5