x-3/7x-21 - solution

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Solution for x-3/7x-21 equation:

x in (-oo:+oo)

x-((3/7)*x)-21 = 0

x+(-3/7)*x-21 = 0

4/7*x-21 = 0 // + 21

4/7*x = 21 // : 4/7

x = 21/4/7

x = 147/4

x = 147/4

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