$\"\"$

The equation is $\"\"$ .

$\"\"$ (Add 4 to each side)

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

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

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

$\"\"$ (Multiply each side by negative one)

$\"\"$ (Product of two same sign is positive) $\"\"$

Check:

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

$\"\"$

$\"\"$ (Product of two same sign is positive)

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

The equality is true. $\"\"$

The value of $\"\"$ .