-1/2+6a+a=139/2

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Solution for -1/2+6a+a=139/2 equation: 


a in (-oo:+oo)

6*a+a-1/2 = 139/2 // - 139/2

6*a+a-1/2-(139/2) = 0

6*a+a-1/2-139/2 = 0

7*a-70 = 0 // + 70

7*a = 70 // : 7

a = 70/7

a = 10

a = 10

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