$\"\"$

The equation is $\"\"$

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

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

$\"\"$ (Subtract 45 from each side)

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

$\"\"$ (Subtract: 45-45=0, 63-45=18)

$\"\"$ (Divide each side by -6)

$\"\"$ (Cancel common terms)

$\"\"$

Verify:

To check the solution, substitute $\"\"$ in original equation.

$\"\"$

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

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

Compare the values, the equation is true. The solution is $\"\"$ .

$\"\"$

The solution is $\"\"$ .