x-(1/3x)=21

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Solution for x-(1/3x)=21 equation: 


x in (-oo:+oo)

x-((1/3)*x) = 21 // - 21

x-((1/3)*x)-21 = 0

x+(-1/3)*x-21 = 0

2/3*x-21 = 0 // + 21

2/3*x = 21 // : 2/3

x = 21/2/3

x = 63/2

x = 63/2

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