128+x=140

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Solution for 128+x=140 equation: 


Simplifying
128 + x = 140

Solving
128 + x = 140

Solving for variable 'x'.

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

Add '-128' to each side of the equation.
128 + -128 + x = 140 + -128

Combine like terms: 128 + -128 = 0
0 + x = 140 + -128
x = 140 + -128

Combine like terms: 140 + -128 = 12
x = 12

Simplifying
x = 12

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