-10+7a+3a=90

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Solution for -10+7a+3a=90 equation: 


a in (-oo:+oo)

7*a+3*a-10 = 90 // - 90

7*a+3*a-90-10 = 0

10*a-100 = 0 // + 100

10*a = 100 // : 10

a = 100/10

a = 10

a = 10

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