$\"\"$

The equality is $\"\"$ .

Apply division property of equality: $\"\"$ .

$\"\"$ (Divide each side by 10)

$\"\"$ (Cancel common terms)

$\"\"$ (Divide: $\"\"$ )

$\"\"$ (Multiply each side by negative one)

$\"\"$ (Product of two same signs positive) $\"\"$

Check:

To check, substitute $\"\"$ in the equation.

$\"\"$ (Write the equation)

$\"\"$ (Substitute $\"\"$ )

$\"\"$ (Multiply: $\"\"$ )

The equality is true. $\"\"$

The solution is $\"\"$ .