$\"\"$

The equation is $\"\"$ .

Apply addition property of equality: If a = b then a + c = b + c.

$\"\"$ (Add 5 to each side)

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

$\"\"$ (Add: 15 + 5 = 20) $\"\"$

Apply division property of equality: If a = b then $\"\"$ .

$\"\"$ (Divide each side by 4) \ \

$\"\"$ (Cancel common terms) \ \

$\"\"$ (Divide: $\"\"$ ) \ \ $\"\"$

The value of $\"\"$ .