x+2x-21=180

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Solution for x+2x-21=180 equation:


Simplifying
x + 2x + -21 = 180

Reorder the terms:
-21 + x + 2x = 180

Combine like terms: x + 2x = 3x
-21 + 3x = 180

Solving
-21 + 3x = 180

Solving for variable 'x'.

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

Add '21' to each side of the equation.
-21 + 21 + 3x = 180 + 21

Combine like terms: -21 + 21 = 0
0 + 3x = 180 + 21
3x = 180 + 21

Combine like terms: 180 + 21 = 201
3x = 201

Divide each side by '3'.
x = 67

Simplifying
x = 67

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