-4a+1+6a=21

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Solution for -4a+1+6a=21 equation: 


a in (-oo:+oo)

6*a-4*a+1 = 21 // - 21

6*a-4*a-21+1 = 0

2*a-20 = 0 // + 20

2*a = 20 // : 2

a = 20/2

a = 10

a = 10

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