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

\

The equation is $\"\"$ . \ \

\

\

$\"\"$ (Substitute $\"\"$ )

\

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

\

According to addition property of equality: if a = b, then a + c = b + c.

\

$\"\"$ (Add 28 to each side)

\

$\"\"$ (Commutative property: a + b = b + a)

\

$\"\"$ (Addtive inverse property: $\"\"$ 28 + 28 = 0)

\

$\"\"$ (Add: $\"\"$ ) $\"\"$

\

According to division property of equality: if $\"\"$ , then $\"\"$ .

\

$\"\"$ (Divide each side by 4)

\

$\"\"$ (Cancel common terms)

\

$\"\"$ (Divide: $\"\"$ ) $\"\"$

\

Verify:

\

To check the solution, substitute $\"\"$ in original equation.

\

$\"\"$

\

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

\

$\"\"$ (Divide; $\"\"$ )

\

$\"\"$ (Add: $\"\"$ )

\

Compare the values, the equation is true. The solution is $\"\"$ . $\"\"$

\

The solution is $\"\"$ .

\