5a+9=7a+9

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Solution for 5a+9=7a+9 equation: 


a in (-oo:+oo)

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

5*a-(7*a)-9+9 = 0

5*a-7*a-9+9 = 0

-2*a = 0 // : -2

a = 0

a = 0

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