-3+3x=-21

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Solution for -3+3x=-21 equation: 


x in (-oo:+oo)

3*x-3 = -21 // + 21

3*x-3+21 = 0

3*x+18 = 0 // - 18

3*x = -18 // : 3

x = -18/3

x = -6

x = -6

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