9-7a+3a=-23

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Solution for 9-7a+3a=-23 equation: 


a in (-oo:+oo)

3*a-(7*a)+9 = -23 // + 23

3*a-(7*a)+9+23 = 0

3*a-7*a+9+23 = 0

32-4*a = 0 // - 32

-4*a = -32 // : -4

a = -32/(-4)

a = 8

a = 8

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