-18=-7a+3a+6

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Solution for -18=-7a+3a+6 equation: 


a in (-oo:+oo)

-18 = 3*a-7*a+6 // - 3*a-7*a+6

-(-7*a)-(3*a)-18-6 = 0

7*a-3*a-18-6 = 0

4*a-24 = 0 // + 24

4*a = 24 // : 4

a = 24/4

a = 6

a = 6

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