4/7r=12

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Solution for 4/7r=12 equation: 


r in (-oo:+oo)

(4/7)*r = 12 // - 12

(4/7)*r-12 = 0

4/7*r-12 = 0 // + 12

4/7*r = 12 // : 4/7

r = 12/4/7

r = 21

r = 21

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