x+2x-20=280

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Solution for x+2x-20=280 equation: 


Simplifying
x + 2x + -20 = 280

Reorder the terms:
-20 + x + 2x = 280

Combine like terms: x + 2x = 3x
-20 + 3x = 280

Solving
-20 + 3x = 280

Solving for variable 'x'.

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

Add '20' to each side of the equation.
-20 + 20 + 3x = 280 + 20

Combine like terms: -20 + 20 = 0
0 + 3x = 280 + 20
3x = 280 + 20

Combine like terms: 280 + 20 = 300
3x = 300

Divide each side by '3'.
x = 100

Simplifying
x = 100

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