$\"subtraction$ $\"\"$

The equality is $\"\"$ .

According to addition property of equality: Add 3 to each side.

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

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

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

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

Check:-

To check, substitute 24, in $\"\"$ .

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

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

The equality is true. $\"\"$

The equality solution is $\"\"$ .