4a-7=-5a+20

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Solution for 4a-7=-5a+20 equation: 


a in (-oo:+oo)

4*a-7 = 20-5*a // - 20-5*a

4*a-(-5*a)-20-7 = 0

4*a+5*a-20-7 = 0

9*a-27 = 0 // + 27

9*a = 27 // : 9

a = 27/9

a = 3

a = 3

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