x-1/3x=20

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Solution for x-1/3x=20 equation: 


x in (-oo:+oo)

x-((1/3)*x) = 20 // - 20

x-((1/3)*x)-20 = 0

x+(-1/3)*x-20 = 0

2/3*x-20 = 0 // + 20

2/3*x = 20 // : 2/3

x = 20/2/3

x = 30

x = 30

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