12r-4(r+5)=4(3r-4)-28

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Solution for 12r-4(r+5)=4(3r-4)-28 equation:


Simplifying
12r + -4(r + 5) = 4(3r + -4) + -28

Reorder the terms:
12r + -4(5 + r) = 4(3r + -4) + -28
12r + (5 * -4 + r * -4) = 4(3r + -4) + -28
12r + (-20 + -4r) = 4(3r + -4) + -28

Reorder the terms:
-20 + 12r + -4r = 4(3r + -4) + -28

Combine like terms: 12r + -4r = 8r
-20 + 8r = 4(3r + -4) + -28

Reorder the terms:
-20 + 8r = 4(-4 + 3r) + -28
-20 + 8r = (-4 * 4 + 3r * 4) + -28
-20 + 8r = (-16 + 12r) + -28

Reorder the terms:
-20 + 8r = -16 + -28 + 12r

Combine like terms: -16 + -28 = -44
-20 + 8r = -44 + 12r

Solving
-20 + 8r = -44 + 12r

Solving for variable 'r'.

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

Add '-12r' to each side of the equation.
-20 + 8r + -12r = -44 + 12r + -12r

Combine like terms: 8r + -12r = -4r
-20 + -4r = -44 + 12r + -12r

Combine like terms: 12r + -12r = 0
-20 + -4r = -44 + 0
-20 + -4r = -44

Add '20' to each side of the equation.
-20 + 20 + -4r = -44 + 20

Combine like terms: -20 + 20 = 0
0 + -4r = -44 + 20
-4r = -44 + 20

Combine like terms: -44 + 20 = -24
-4r = -24

Divide each side by '-4'.
r = 6

Simplifying
r = 6

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