1+5a+2a=78

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Solution for 1+5a+2a=78 equation: 


a in (-oo:+oo)

5*a+2*a+1 = 78 // - 78

5*a+2*a-78+1 = 0

7*a-77 = 0 // + 77

7*a = 77 // : 7

a = 77/7

a = 11

a = 11

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