3(1x+7)=21 - solution

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Solution for 3(1x+7)=21 equation:

x in (-oo:+oo)

3*(1*x+7) = 21 // - 21

3*(1*x+7)-21 = 0

3*(x+7)-21 = 0

3*(x+7)-21 = 0

3*x = 0

3*x = 0

3*x = 0 // : 3

x = 0

x = 0

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