123-a=118

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Solution for 123-a=118 equation: 


Simplifying
123 + -1a = 118

Solving
123 + -1a = 118

Solving for variable 'a'.

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

Add '-123' to each side of the equation.
123 + -123 + -1a = 118 + -123

Combine like terms: 123 + -123 = 0
0 + -1a = 118 + -123
-1a = 118 + -123

Combine like terms: 118 + -123 = -5
-1a = -5

Divide each side by '-1'.
a = 5

Simplifying
a = 5

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