$\"\"$

The system of equations are $\"\"$ .

Equation 1: $\"\"$

Equation 2: $\"\"$ .

The first equation is already solved for z.

$\"\"$

The value of $\"\"$ substitute in the second equation $\"\"$ to find v.

$\"\"$

Subtract 8 from each side.

$\"\"$

The value of $\"\"$ substitute in the either equation to find z.

Equation 1: $\"\"$

$\"\"$

The solution is $\"\"$ .