3(5+7a)=99

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Solution for 3(5+7a)=99 equation: 


a in (-oo:+oo)

3*(7*a+5) = 99 // - 99

3*(7*a+5)-99 = 0

3*(7*a+5)-99 = 0

21*a-84 = 0

21*a-84 = 0

21*a-84 = 0 // + 84

21*a = 84 // : 21

a = 84/21

a = 4

a = 4

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