2x+x+12=84

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Solution for 2x+x+12=84 equation:


Simplifying
2x + x + 12 = 84

Reorder the terms:
12 + 2x + x = 84

Combine like terms: 2x + x = 3x
12 + 3x = 84

Solving
12 + 3x = 84

Solving for variable 'x'.

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

Add '-12' to each side of the equation.
12 + -12 + 3x = 84 + -12

Combine like terms: 12 + -12 = 0
0 + 3x = 84 + -12
3x = 84 + -12

Combine like terms: 84 + -12 = 72
3x = 72

Divide each side by '3'.
x = 24

Simplifying
x = 24

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