7-3a=5a+87

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Solution for 7-3a=5a+87 equation: 


a in (-oo:+oo)

7-(3*a) = 5*a+87 // - 5*a+87

7-(3*a)-(5*a)-87 = 0

7-3*a-5*a-87 = 0

-8*a-80 = 0 // + 80

-8*a = 80 // : -8

a = 80/(-8)

a = -10

a = -10

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