42-9x=123

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Solution for 42-9x=123 equation:


Simplifying
42 + -9x = 123

Solving
42 + -9x = 123

Solving for variable 'x'.

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

Add '-42' to each side of the equation.
42 + -42 + -9x = 123 + -42

Combine like terms: 42 + -42 = 0
0 + -9x = 123 + -42
-9x = 123 + -42

Combine like terms: 123 + -42 = 81
-9x = 81

Divide each side by '-9'.
x = -9

Simplifying
x = -9

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