3r+2(r+4)=12

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Solution for 3r+2(r+4)=12 equation:


Simplifying
3r + 2(r + 4) = 12

Reorder the terms:
3r + 2(4 + r) = 12
3r + (4 * 2 + r * 2) = 12
3r + (8 + 2r) = 12

Reorder the terms:
8 + 3r + 2r = 12

Combine like terms: 3r + 2r = 5r
8 + 5r = 12

Solving
8 + 5r = 12

Solving for variable 'r'.

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

Add '-8' to each side of the equation.
8 + -8 + 5r = 12 + -8

Combine like terms: 8 + -8 = 0
0 + 5r = 12 + -8
5r = 12 + -8

Combine like terms: 12 + -8 = 4
5r = 4

Divide each side by '5'.
r = 0.8

Simplifying
r = 0.8

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