4(r-2)+2(r+1)=12

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Solution for 4(r-2)+2(r+1)=12 equation:


Simplifying
4(r + -2) + 2(r + 1) = 12

Reorder the terms:
4(-2 + r) + 2(r + 1) = 12
(-2 * 4 + r * 4) + 2(r + 1) = 12
(-8 + 4r) + 2(r + 1) = 12

Reorder the terms:
-8 + 4r + 2(1 + r) = 12
-8 + 4r + (1 * 2 + r * 2) = 12
-8 + 4r + (2 + 2r) = 12

Reorder the terms:
-8 + 2 + 4r + 2r = 12

Combine like terms: -8 + 2 = -6
-6 + 4r + 2r = 12

Combine like terms: 4r + 2r = 6r
-6 + 6r = 12

Solving
-6 + 6r = 12

Solving for variable 'r'.

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

Add '6' to each side of the equation.
-6 + 6 + 6r = 12 + 6

Combine like terms: -6 + 6 = 0
0 + 6r = 12 + 6
6r = 12 + 6

Combine like terms: 12 + 6 = 18
6r = 18

Divide each side by '6'.
r = 3

Simplifying
r = 3

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