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

The sentence is “A number times 3 is 45”

Let n be the number

The word times indicates multiplication, and the symbol is $\"\"$

Thus, the numerical expression is “ $\"\"$ ”

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

Division property of equality: If a = b then $\"\"$ .

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

$\"\"$ (Cancel common terms)

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

The solution is 15.