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

The expression is $\"\"$

Whether the equation is true or not

$\"\"$

According to subtraction Property of equality: If $\"\"$ then, $\"\"$ .

$\"\"$ (Subtract 5 from each side)

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

$\"\"$ (Additive identity property: $\"\"$ )

$\"\"$ (Subtract: $\"\"$ ) $\"\"$ \ \ $\"\"$ (Multiply each side by 3)

$\"\"$ (Cancel common terms)

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

The equation is true.