-39=-2a-7a+6

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Solution for -39=-2a-7a+6 equation: 


a in (-oo:+oo)

-39 = 6-2*a-(7*a) // - 6-2*a-(7*a)

7*a-(-2*a)-39-6 = 0

2*a+7*a-39-6 = 0

9*a-45 = 0 // + 45

9*a = 45 // : 9

a = 45/9

a = 5

a = 5

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