$\"\"$

Substitution Method:

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

Solve the equation 1: $\"\"$ for x, since the x has a coefficient of 1.

Add y to each side.

$\"\"$

$\"\"$ .

Substitute the value of $\"\"$ in the equation 2: $\"\"$ and solve for y.

$\"\"$

Combine like terms.

$\"\"$ . $\"\"$

Divide each side by 7.

$\"\"$

Cancel common terms.

$\"\"$ .

Substitute the value of $\"\"$ in the equation $\"\"$ to find the value of x.

$\"\"$ . $\"\"$

The solution $\"\"$ .