-12(1+6r)+10(8r+4)=-3r+7r

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Solution for -12(1+6r)+10(8r+4)=-3r+7r equation:


Simplifying
-12(1 + 6r) + 10(8r + 4) = -3r + 7r
(1 * -12 + 6r * -12) + 10(8r + 4) = -3r + 7r
(-12 + -72r) + 10(8r + 4) = -3r + 7r

Reorder the terms:
-12 + -72r + 10(4 + 8r) = -3r + 7r
-12 + -72r + (4 * 10 + 8r * 10) = -3r + 7r
-12 + -72r + (40 + 80r) = -3r + 7r

Reorder the terms:
-12 + 40 + -72r + 80r = -3r + 7r

Combine like terms: -12 + 40 = 28
28 + -72r + 80r = -3r + 7r

Combine like terms: -72r + 80r = 8r
28 + 8r = -3r + 7r

Combine like terms: -3r + 7r = 4r
28 + 8r = 4r

Solving
28 + 8r = 4r

Solving for variable 'r'.

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

Add '-4r' to each side of the equation.
28 + 8r + -4r = 4r + -4r

Combine like terms: 8r + -4r = 4r
28 + 4r = 4r + -4r

Combine like terms: 4r + -4r = 0
28 + 4r = 0

Add '-28' to each side of the equation.
28 + -28 + 4r = 0 + -28

Combine like terms: 28 + -28 = 0
0 + 4r = 0 + -28
4r = 0 + -28

Combine like terms: 0 + -28 = -28
4r = -28

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

Simplifying
r = -7

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