$\"\"$ $\"\"$

The expression is $\"\"$ .

According to subtraction property of equality: Subtract $\"\"$ from each side.

$\"\"$

$\"\"$ (Subtract: $\"\"$ )

$\"\"$ (Apply commutative inverse property: a + b = b + a)

$\"\"$ (Apply addititve inverse property: $\"\"$ ) \ \ $\"\"$

Check:

Check the solution by substituting $\"\"$ in the original equation.

$\"\"$

$\"\"$ (Add: $\"\"$ ) $\"\"$

The value of $\"\"$ .