138-x=221

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Solution for 138-x=221 equation: 


Simplifying
138 + -1x = 221

Solving
138 + -1x = 221

Solving for variable 'x'.

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

Add '-138' to each side of the equation.
138 + -138 + -1x = 221 + -138

Combine like terms: 138 + -138 = 0
0 + -1x = 221 + -138
-1x = 221 + -138

Combine like terms: 221 + -138 = 83
-1x = 83

Divide each side by '-1'.
x = -83

Simplifying
x = -83

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