3r+4r-2=12

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Solution for 3r+4r-2=12 equation:


Simplifying
3r + 4r + -2 = 12

Reorder the terms:
-2 + 3r + 4r = 12

Combine like terms: 3r + 4r = 7r
-2 + 7r = 12

Solving
-2 + 7r = 12

Solving for variable 'r'.

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

Add '2' to each side of the equation.
-2 + 2 + 7r = 12 + 2

Combine like terms: -2 + 2 = 0
0 + 7r = 12 + 2
7r = 12 + 2

Combine like terms: 12 + 2 = 14
7r = 14

Divide each side by '7'.
r = 2

Simplifying
r = 2

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