$\"\"$

The equations are

$\"\"$ Equation (1)

$\"\"$ Equation (2)

Eliminate the variable n by adding the equation (1) and (2).

$\"\"$ (Add the corresponding columns) $\"\"$

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

Divide each side by 8.

$\"\"$

Substitute $\"\"$ in equation (1).

$\"\"$

Subtract 2 from each side.

$\"\"$ \ \

$\"\"$

$\"\"$ \ \

The solution is $\"\"$ .

$\"\"$

The solution is $\"\"$ .