3(r+12)=7r

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Solution for 3(r+12)=7r equation:


Simplifying
3(r + 12) = 7r

Reorder the terms:
3(12 + r) = 7r
(12 * 3 + r * 3) = 7r
(36 + 3r) = 7r

Solving
36 + 3r = 7r

Solving for variable 'r'.

Move all terms containing r to the left, all other terms to the right.

Add '-7r' to each side of the equation.
36 + 3r + -7r = 7r + -7r

Combine like terms: 3r + -7r = -4r
36 + -4r = 7r + -7r

Combine like terms: 7r + -7r = 0
36 + -4r = 0

Add '-36' to each side of the equation.
36 + -36 + -4r = 0 + -36

Combine like terms: 36 + -36 = 0
0 + -4r = 0 + -36
-4r = 0 + -36

Combine like terms: 0 + -36 = -36
-4r = -36

Divide each side by '-4'.
r = 9

Simplifying
r = 9

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