$\"subtraction$ $\"\"$

The equation is $\"\"$ .

Apply subtraction property of equality: Subtract 7 from each side.

$\"\"$

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

$\"\"$ (Apply additive identity property: $\"\"$ )

$\"\"$ (Sustract: $\"\"$ ) $\"\"$

Check:-

To check the solution, substitute x = $\"\"$ , in $\"\"$ .

$\"\"$

$\"\"$ (Sustract: $\"\"$ )

The equation is true. $\"\"$

The solution is $\"\"$ .