-2a+4+6a=20

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Solution for -2a+4+6a=20 equation: 


a in (-oo:+oo)

6*a-2*a+4 = 20 // - 20

6*a-2*a-20+4 = 0

4*a-16 = 0 // + 16

4*a = 16 // : 4

a = 16/4

a = 4

a = 4

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