When a certain number is added to 11 and the result is multiplied by 3. The final result is 45 .Find the number .
x = number
Question means:
( x + 11 ) • 3 = 45
3 x + 33 = 45
Subtract 33 to both sides.
3 x = 12
x = 12 / 3
x= 4
Check result.
4 + 11 = 15
15 • 3 = 45