9+3a-4a=7

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Solution for 9+3a-4a=7 equation: 


a in (-oo:+oo)

3*a-(4*a)+9 = 7 // - 7

3*a-(4*a)-7+9 = 0

3*a-4*a-7+9 = 0

2-a = 0 // - 2

-a = -2 // * -1

a = 2

a = 2

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