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-3x-2x = -10
-5x = -10 /(-5)
x = 2
b) 2(x+1) = x
2x + 2 = x
2x - x = -2
x = -2
x=2
b) 2x+2=x
x=-2
5x = -10 / :5
x = 2
b) 2(x+1) = x
2x + 2 = x / -2x
2 = - 2x / :2
1 = x