2x+x-6=84

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Solution for 2x+x-6=84 equation: 


Simplifying
2x + x + -6 = 84

Reorder the terms:
-6 + 2x + x = 84

Combine like terms: 2x + x = 3x
-6 + 3x = 84

Solving
-6 + 3x = 84

Solving for variable 'x'.

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

Add '6' to each side of the equation.
-6 + 6 + 3x = 84 + 6

Combine like terms: -6 + 6 = 0
0 + 3x = 84 + 6
3x = 84 + 6

Combine like terms: 84 + 6 = 90
3x = 90

Divide each side by '3'.
x = 30

Simplifying
x = 30

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