x-4/5x=3 - solution

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Solution for x-4/5x=3 equation:

x in (-oo:+oo)

x-((4/5)*x) = 3 // - 3

x-((4/5)*x)-3 = 0

x+(-4/5)*x-3 = 0

1/5*x-3 = 0 // + 3

1/5*x = 3 // : 1/5

x = 3/1/5

x = 15

x = 15

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