-7-7a+3a=-55

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Solution for -7-7a+3a=-55 equation: 


a in (-oo:+oo)

3*a-(7*a)-7 = -55 // + 55

3*a-(7*a)-7+55 = 0

3*a-7*a-7+55 = 0

48-4*a = 0 // - 48

-4*a = -48 // : -4

a = -48/(-4)

a = 12

a = 12

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