9=5a+4a-9

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Solution for 9=5a+4a-9 equation: 


a in (-oo:+oo)

9 = 5*a+4*a-9 // - 5*a+4*a-9

9-(5*a)-(4*a)+9 = 0

9-5*a-4*a+9 = 0

18-9*a = 0 // - 18

-9*a = -18 // : -9

a = -18/(-9)

a = 2

a = 2

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