$\"\"$

The equation is $\"\"$ .

Apply addition property of equality: Add 8 to each side.

$\"\"$

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

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

$\"\"$ (Add: 11 + 8 = 19) $\"\"$

Apply division property of equality: Divide each side by 1.5.

$\"\"$

$\"\"$ (Cancel common terms)

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

The value of a is 12.6.