100=4a+5a+10

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Solution for 100=4a+5a+10 equation: 


a in (-oo:+oo)

100 = 4*a+5*a+10 // - 4*a+5*a+10

100-(4*a)-(5*a)-10 = 0

100-4*a-5*a-10 = 0

90-9*a = 0 // - 90

-9*a = -90 // : -9

a = -90/(-9)

a = 10

a = 10

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