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Solving One-Step Subtraction Equations

Some linear equations can be solved with a single operation. For this type of equation, use the inverse operation to solve.

Example :

Solve for $n$ .

$x - 9 = 15$

The inverse operation of subtraction is addition. So, add $9$ to both sides.

$\begin{array}{l} x - 9 + 9 = 15 + 9 \\ x = 24 \end{array}$

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