b/9+1/7=20 - solution

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Solution for b/9+1/7=20 equation:

b in (-oo:+oo)

b/9+1/7 = 20 // - 20

b/9+1/7-20 = 0

1/9*b-139/7 = 0 // + 139/7

1/9*b = 139/7 // : 1/9

b = 139/7/1/9

b = 1251/7

b = 1251/7

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