$\"\"$

Let x = the number.

Three times the number represents 3x.

Twenty more than three times of the number represents 3x + 20. $\"\"$

$\"\"$

$\"\"$ (Subtract 20 from each side)

$\"\"$ (Apply additive inverse property: $\"\"$ )

$\"\"$ (Apply additive identity property: $\"\"$ )

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

$\"\"$ (Divide each side by 3)

$\"\"$ (Cancel common terms)

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

The number is $\"\"$ .