7/4x=21

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Solution for 7/4x=21 equation: 


x in (-oo:+oo)

(7/4)*x = 21 // - 21

(7/4)*x-21 = 0

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

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

x = 21/7/4

x = 12

x = 12

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