5(r+4)-7r=12

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Solution for 5(r+4)-7r=12 equation:


Simplifying
5(r + 4) + -7r = 12

Reorder the terms:
5(4 + r) + -7r = 12
(4 * 5 + r * 5) + -7r = 12
(20 + 5r) + -7r = 12

Combine like terms: 5r + -7r = -2r
20 + -2r = 12

Solving
20 + -2r = 12

Solving for variable 'r'.

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

Add '-20' to each side of the equation.
20 + -20 + -2r = 12 + -20

Combine like terms: 20 + -20 = 0
0 + -2r = 12 + -20
-2r = 12 + -20

Combine like terms: 12 + -20 = -8
-2r = -8

Divide each side by '-2'.
r = 4

Simplifying
r = 4

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