Increase a number by 21, multiply the result by 3, then subtract 9, and divide by 5. If the final result is 30, what number did you start with?
((n+21)(3)-9)/5 = 30
n = 32
To find the number that you started with, we need to work backwards from the final result of 30. Let's break down the steps in reverse order:
1. Multiply the final result by 5:
30 * 5 = 150
2. Add 9 to the result:
150 + 9 = 159
3. Divide the sum by 3:
159 / 3 = 53
4. Subtract 21 from the quotient:
53 - 21 = 32
So, the number you started with is 32.