3+7x-x=75 - solution

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Solution for 3+7x-x=75 equation:

x in (-oo:+oo)

7*x-x+3 = 75 // - 75

7*x-x-75+3 = 0

6*x-72 = 0 // + 72

6*x = 72 // : 6

x = 72/6

x = 12

x = 12

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