R/3+7=27-R - solution

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Solution for R/3+7=27-R equation:

R in (-oo:+oo)

R/3+7 = 27-R // - 27-R

R/3+R-27+7 = 0

4/3*R-20 = 0 // + 20

4/3*R = 20 // : 4/3

R = 20/4/3

R = 15

R = 15

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