-4a-1=-13

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Solution for -4a-1=-13 equation: 


a in (-oo:+oo)

-4*a-1 = -13 // + 13

13-4*a-1 = 0

12-4*a = 0 // - 12

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

a = -12/(-4)

a = 3

a = 3

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