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

The equation is $\"\"$ .

According to addition property of equality: Add 7 to each side.

$\"\"$

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

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

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

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

$\"\"$ (Cancel common terms)

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

Option B is right choice.