Question

4 Twice the sum of two numbers is 36. If one of the numbers is 10, Twenty years from now, I will be 4 times as old as my present age. What is my present age​

Answer 1

7

Explanation:

The sum of the two number is 10 + x, which when doubled equals 36. Divide the 36/2, which gets to 18. Move the 10 to the other side which gets 18-10 to get 8. 20 years from now, so add 20. 20+8 is 28. 4 times my present age. So do the inverse and you will get 28/4 which equals 7. You're present age is 7.