$\"\"$

The equation is $\"\"$ .

Apply addition property of equality: Add 13t to each side.

$\"\"$

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

Apply commutative property of addition: a + b = b + a.

$\"\"$

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

Apply subtraction property of equality: Subtract 11v from each side.

$\"\"$

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

Apply division property of equality: Divide each side by 31.

$\"\"$

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

The value of $\"\"$ .