79=3a+7a+9

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Solution for 79=3a+7a+9 equation: 


a in (-oo:+oo)

79 = 3*a+7*a+9 // - 3*a+7*a+9

79-(3*a)-(7*a)-9 = 0

79-3*a-7*a-9 = 0

70-10*a = 0 // - 70

-10*a = -70 // : -10

a = -70/(-10)

a = 7

a = 7

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