$\"\"$

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

According to multiplication property of equality:

For any number a, b and c, If a = b then ac = bc.

$\"\"$ (Multiply each side by 8)

$\"\"$ (Cancel common terms)

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

$\"\"$ \ \

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

$\"\"$ (Add 3 to both sides)

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

$\"\"$ (Add: 160 + 3 = 163)

$\"\"$

Check:

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

$\"\"$

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

20 = 20 (Divide: $\"\"$ )

Compare the values, the equation is true.

$\"\"$

The value of $\"\"$ .