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

\

The equations are

\

$\"\"$ Equation(1)

\

$\"\"$ Equation(2)

\

\

\

Multiply the second equation each side by negative 2 .

\

$\"\"$

\

$\"\"$ (Distributive property: $\"\"$ )

\

$\"\"$ (Multiply: $\"\"$ )

\

$\"\"$ Equation (3)

\

$\"\"$

\

Since the coefficients of the x-terms are additive inverses, x-terms

\

can be eliminated by adding the equations 1 and 3.

\ \

Write the equations in column form and add the corresponding columns.

\

$\"\"$

\

$\"\"$ (Divide each side by 11)

\

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

\

Substitute $\"\"$ in Equation (2).

\

$\"\"$

\

$\"\"$ (Multiplicative identity property: $\"\"$ )

\

$\"\"$ (Subtract 5 from each side)

\

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

\

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

\

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

\

$\"\"$

\

The solution is $\"\"$ .