12-R/7=3

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Solution for 12-R/7=3 equation: 


R in (-oo:+oo)

12-(R/7) = 3 // - 3

12-(R/7)-3 = 0

9-1/7*R = 0 // - 9

-1/7*R = -9 // : -1/7

R = -9/(-1/7)

R = 63

R = 63

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