4a-1-2a=7

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Solution for 4a-1-2a=7 equation: 


a in (-oo:+oo)

4*a-(2*a)-1 = 7 // - 7

4*a-(2*a)-7-1 = 0

4*a-2*a-7-1 = 0

2*a-8 = 0 // + 8

2*a = 8 // : 2

a = 8/2

a = 4

a = 4

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