3(r+4)-7r=-16

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Solution for 3(r+4)-7r=-16 equation:


Simplifying
3(r + 4) + -7r = -16

Reorder the terms:
3(4 + r) + -7r = -16
(4 * 3 + r * 3) + -7r = -16
(12 + 3r) + -7r = -16

Combine like terms: 3r + -7r = -4r
12 + -4r = -16

Solving
12 + -4r = -16

Solving for variable 'r'.

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

Add '-12' to each side of the equation.
12 + -12 + -4r = -16 + -12

Combine like terms: 12 + -12 = 0
0 + -4r = -16 + -12
-4r = -16 + -12

Combine like terms: -16 + -12 = -28
-4r = -28

Divide each side by '-4'.
r = 7

Simplifying
r = 7

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