$\"\"$

The equations are

$\"\"$ Equation (1)

$\"\"$ Equation (2)

Multiply the equation (1) by 7.

$\"\"$ Equation (3) $\"\"$

Subtract equation (3) and Equation (1).

$\"\"$

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

$\"\"$ (Divide each side by 37)

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

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

$\"\"$

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

Apply addition property of equality: If a = b then a + c = b + c.

$\"\"$ (Add 5 to each side)

$\"\"$ (Additive inverse property: $\"\"$ 5 + 5 = 0)

$\"\"$ (Add: 1 + 5 = 6) $\"\"$

The solution is $\"\"$ .