243-u=135

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Solution for 243-u=135 equation: 


Simplifying
243 + -1u = 135

Solving
243 + -1u = 135

Solving for variable 'u'.

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

Add '-243' to each side of the equation.
243 + -243 + -1u = 135 + -243

Combine like terms: 243 + -243 = 0
0 + -1u = 135 + -243
-1u = 135 + -243

Combine like terms: 135 + -243 = -108
-1u = -108

Divide each side by '-1'.
u = 108

Simplifying
u = 108

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