13=4a-a-8

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Solution for 13=4a-a-8 equation: 


a in (-oo:+oo)

13 = 4*a-a-8 // - 4*a-a-8

a-(4*a)+8+13 = 0

a-4*a+8+13 = 0

21-3*a = 0 // - 21

-3*a = -21 // : -3

a = -21/(-3)

a = 7

a = 7

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