x+x+40+30=180

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Solution for x+x+40+30=180 equation: 


Simplifying
x + x + 40 + 30 = 180

Reorder the terms:
40 + 30 + x + x = 180

Combine like terms: 40 + 30 = 70
70 + x + x = 180

Combine like terms: x + x = 2x
70 + 2x = 180

Solving
70 + 2x = 180

Solving for variable 'x'.

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

Add '-70' to each side of the equation.
70 + -70 + 2x = 180 + -70

Combine like terms: 70 + -70 = 0
0 + 2x = 180 + -70
2x = 180 + -70

Combine like terms: 180 + -70 = 110
2x = 110

Divide each side by '2'.
x = 55

Simplifying
x = 55

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