-3-7a+3a=-39

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Solution for -3-7a+3a=-39 equation: 


a in (-oo:+oo)

3*a-(7*a)-3 = -39 // + 39

3*a-(7*a)-3+39 = 0

3*a-7*a-3+39 = 0

36-4*a = 0 // - 36

-4*a = -36 // : -4

a = -36/(-4)

a = 9

a = 9

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