7-x+6x=42 - solution

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Solution for 7-x+6x=42 equation:

x in (-oo:+oo)

6*x-x+7 = 42 // - 42

6*x-x-42+7 = 0

5*x-35 = 0 // + 35

5*x = 35 // : 5

x = 35/5

x = 7

x = 7

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