4a-4-a=20 - solution

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

a in (-oo:+oo)

4*a-a-4 = 20 // - 20

4*a-a-20-4 = 0

3*a-24 = 0 // + 24

3*a = 24 // : 3

a = 24/3

a = 8

a = 8

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