51-x=42

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Solution for 51-x=42 equation:


Simplifying
51 + -1x = 42

Solving
51 + -1x = 42

Solving for variable 'x'.

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

Add '-51' to each side of the equation.
51 + -51 + -1x = 42 + -51

Combine like terms: 51 + -51 = 0
0 + -1x = 42 + -51
-1x = 42 + -51

Combine like terms: 42 + -51 = -9
-1x = -9

Divide each side by '-1'.
x = 9

Simplifying
x = 9

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