a-3a/7=4

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Solution for a-3a/7=4 equation: 


a in (-oo:+oo)

a-((3*a)/7) = 4 // - 4

a-((3*a)/7)-4 = 0

a+(-3/7)*a-4 = 0

4/7*a-4 = 0 // + 4

4/7*a = 4 // : 4/7

a = 4/4/7

a = 7

a = 7

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