18/3r=42

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Solution for 18/3r=42 equation: 


r in (-oo:+oo)

(18/3)*r = 42 // - 42

(18/3)*r-42 = 0

6*r-42 = 0 // + 42

6*r = 42 // : 6

r = 42/6

r = 7

r = 7

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