x-(3/4x)=21

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Solution for x-(3/4x)=21 equation: 


x in (-oo:+oo)

x-((3/4)*x) = 21 // - 21

x-((3/4)*x)-21 = 0

x+(-3/4)*x-21 = 0

1/4*x-21 = 0 // + 21

1/4*x = 21 // : 1/4

x = 21/1/4

x = 84

x = 84

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