280+x+x=360

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Solution for 280+x+x=360 equation: 


Simplifying
280 + x + x = 360

Combine like terms: x + x = 2x
280 + 2x = 360

Solving
280 + 2x = 360

Solving for variable 'x'.

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

Add '-280' to each side of the equation.
280 + -280 + 2x = 360 + -280

Combine like terms: 280 + -280 = 0
0 + 2x = 360 + -280
2x = 360 + -280

Combine like terms: 360 + -280 = 80
2x = 80

Divide each side by '2'.
x = 40

Simplifying
x = 40

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