C=3R+7divided by R Solve for R?

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C=3R+7divided by R Solve for R?

2006-12-03 12:37:36 · 3 answers · asked by celticevening 1 in Science & Mathematics ➔ Mathematics

3 answers

C=(3R+7)/R
CR=3R+7
CR-3R=7
R(C-3)=7
R=7/(C-3)

2006-12-03 12:55:12 · answer #1 · answered by David M 2 · 0⤊ 0⤋

Divide through by r, then rearrange to isolate the r:

c/r = 3 + 7/r

c/r - 7/r = 3

(c-7) / r = 3

(c-7) / 3 = r (get this last step by cross multiplying the above)

Hope that helped!

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2006-12-03 12:45:20 · answer #2 · answered by I ♥ AUG 6 · 0⤊ 0⤋

C=3R+7
-7
C-7=3R
C-7=/3
C-7/3=R

C-7/3=R is the answer.

2006-12-03 12:44:12 · answer #3 · answered by patriots15fan 3 · 0⤊ 0⤋