$\"\"$

\

The equations are

\

$\"\"$ Equation (1)

\

$\"\"$ Equation (2)

\

\

Eliminate the variable v by subtracting the equation (1) from (2).

\

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

\

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

\

$\"\"$

\

Apply subtraction property of equality; if a = b, then $\"\"$ .

\

$\"\"$ (Subtract 4 from each side)

\

Apply commutative property of addition: $\"\"$ .

\

$\"\"$

\

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

\

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

\

$\"\"$ (Subtract: $\"\"$ )

\

The solution is $\"\"$ $\"\"$

\

The solution is $\"\"$ .