7-5a+3a=15

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Solution for 7-5a+3a=15 equation: 


a in (-oo:+oo)

3*a-(5*a)+7 = 15 // - 15

3*a-(5*a)-15+7 = 0

3*a-5*a-15+7 = 0

-2*a-8 = 0 // + 8

-2*a = 8 // : -2

a = 8/(-2)

a = -4

a = -4

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