4-7a-a=20

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Solution for 4-7a-a=20 equation: 


a in (-oo:+oo)

4-(7*a)-a = 20 // - 20

4-(7*a)-a-20 = 0

4-7*a-a-20 = 0

-8*a-16 = 0 // + 16

-8*a = 16 // : -8

a = 16/(-8)

a = -2

a = -2

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