c/9-7=20 - solution

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Solution for c/9-7=20 equation:

c in (-oo:+oo)

c/9-7 = 20 // - 20

c/9-20-7 = 0

1/9*c-27 = 0 // + 27

1/9*c = 27 // : 1/9

c = 27/1/9

c = 243

c = 243

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