80=140-X

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Solution for 80=140-X equation:


Simplifying
80 = 140 + -1X

Solving
80 = 140 + -1X

Solving for variable 'X'.

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

Add 'X' to each side of the equation.
80 + X = 140 + -1X + X

Combine like terms: -1X + X = 0
80 + X = 140 + 0
80 + X = 140

Add '-80' to each side of the equation.
80 + -80 + X = 140 + -80

Combine like terms: 80 + -80 = 0
0 + X = 140 + -80
X = 140 + -80

Combine like terms: 140 + -80 = 60
X = 60

Simplifying
X = 60

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