23-a=42

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Solution for 23-a=42 equation:


Simplifying
23 + -1a = 42

Solving
23 + -1a = 42

Solving for variable 'a'.

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

Add '-23' to each side of the equation.
23 + -23 + -1a = 42 + -23

Combine like terms: 23 + -23 = 0
0 + -1a = 42 + -23
-1a = 42 + -23

Combine like terms: 42 + -23 = 19
-1a = 19

Divide each side by '-1'.
a = -19

Simplifying
a = -19

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