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The equation is $\"\"$ .

Solve the equation $\"\"$ for a.

Group like terms.

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Combine like terms.

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Add 10 to each side.

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$\"\"$ .

Multiply each side by negative 1.

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$\"\"$ . $\"\"$

To check the solution, substitute the value of $\"\"$ in the original equation.

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$\"\"$ .

The above statement is true, so the value of $\"\"$ is the solution of original equation. $\"\"$

The value of $\"\"$ .