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

The expression is $\"\"$ .

According to subtraction property of equality: Subtract 2.2 from each side.

$\"\"$

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

$\"\"$ (Addititve inverse property: $\"\"$ )

$\"\"$ (Simplify) $\"\"$

Check:

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

$\"\"$

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

The value of $\"\"$ .