5(1+4a)=85

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Solution for 5(1+4a)=85 equation: 


a in (-oo:+oo)

5*(4*a+1) = 85 // - 85

5*(4*a+1)-85 = 0

5*(4*a+1)-85 = 0

20*a-80 = 0

20*a-80 = 0

20*a-80 = 0 // + 80

20*a = 80 // : 20

a = 80/20

a = 4

a = 4

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