-1=4a+5/7

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Solution for -1=4a+5/7 equation: 


a in (-oo:+oo)

-1 = 4*a+5/7 // - 4*a+5/7

-(4*a)-(5/7)-1 = 0

-4*a-5/7-1 = 0

-4*a-12/7 = 0 // + 12/7

-4*a = 12/7 // : -4

a = 12/7/(-4)

a = -3/7

a = -3/7

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