3(-r+4)+(12r+4)=

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Solution for 3(-r+4)+(12r+4)= equation:


Simplifying
3(-1r + 4) + (12r + 4) = 0

Reorder the terms:
3(4 + -1r) + (12r + 4) = 0
(4 * 3 + -1r * 3) + (12r + 4) = 0
(12 + -3r) + (12r + 4) = 0

Reorder the terms:
12 + -3r + (4 + 12r) = 0

Remove parenthesis around (4 + 12r)
12 + -3r + 4 + 12r = 0

Reorder the terms:
12 + 4 + -3r + 12r = 0

Combine like terms: 12 + 4 = 16
16 + -3r + 12r = 0

Combine like terms: -3r + 12r = 9r
16 + 9r = 0

Solving
16 + 9r = 0

Solving for variable 'r'.

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

Add '-16' to each side of the equation.
16 + -16 + 9r = 0 + -16

Combine like terms: 16 + -16 = 0
0 + 9r = 0 + -16
9r = 0 + -16

Combine like terms: 0 + -16 = -16
9r = -16

Divide each side by '9'.
r = -1.777777778

Simplifying
r = -1.777777778

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