9=2a+7a+9

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Solution for 9=2a+7a+9 equation: 


a in (-oo:+oo)

9 = 2*a+7*a+9 // - 2*a+7*a+9

9-(2*a)-(7*a)-9 = 0

9-2*a-7*a-9 = 0

-9*a = 0 // : -9

a = 0

a = 0

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