40-x=9

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Solution for 40-x=9 equation:


Simplifying
40 + -1x = 9

Solving
40 + -1x = 9

Solving for variable 'x'.

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

Add '-40' to each side of the equation.
40 + -40 + -1x = 9 + -40

Combine like terms: 40 + -40 = 0
0 + -1x = 9 + -40
-1x = 9 + -40

Combine like terms: 9 + -40 = -31
-1x = -31

Divide each side by '-1'.
x = 31

Simplifying
x = 31

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