71=-4a-5a+8

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Solution for 71=-4a-5a+8 equation: 


a in (-oo:+oo)

71 = 8-4*a-(5*a) // - 8-4*a-(5*a)

5*a-(-4*a)-8+71 = 0

4*a+5*a-8+71 = 0

9*a+63 = 0 // - 63

9*a = -63 // : 9

a = -63/9

a = -7

a = -7

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