(12r+8)-(2r+12)=

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Solution for (12r+8)-(2r+12)= equation:


Simplifying
(12r + 8) + -1(2r + 12) = 0

Reorder the terms:
(8 + 12r) + -1(2r + 12) = 0

Remove parenthesis around (8 + 12r)
8 + 12r + -1(2r + 12) = 0

Reorder the terms:
8 + 12r + -1(12 + 2r) = 0
8 + 12r + (12 * -1 + 2r * -1) = 0
8 + 12r + (-12 + -2r) = 0

Reorder the terms:
8 + -12 + 12r + -2r = 0

Combine like terms: 8 + -12 = -4
-4 + 12r + -2r = 0

Combine like terms: 12r + -2r = 10r
-4 + 10r = 0

Solving
-4 + 10r = 0

Solving for variable 'r'.

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

Add '4' to each side of the equation.
-4 + 4 + 10r = 0 + 4

Combine like terms: -4 + 4 = 0
0 + 10r = 0 + 4
10r = 0 + 4

Combine like terms: 0 + 4 = 4
10r = 4

Divide each side by '10'.
r = 0.4

Simplifying
r = 0.4

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