Question

18. Three more than twice a number is equal to 21.:

19. The sum of the squares of three consecutive odd integers is 67.

:

20. The difference of the square of three consecutive even integers is 116.

:

7.3. Solving Problems Involving Linear Equations in One Variable

Solve the following problems:

1. The product of the reciprocal of a number and 48 is 12. What is the number?

2. In nine years, Charlie will be 23 years old. If Charlie is 5 years older than Marlon,

how old is Charlie at present?

3. Steven and Jeremy take 5 ½ hours to do a job. Jeremy alone takes 16 hours to

do the same job. How long would it take Steven to do the same job?

4. Charlene has 7 more twice as many beanie babies as when she started

collecting. She already has 113. How many beanie babies did she start with?

5. Nico is 25 yrs. younger than his mother. Five years ago, his mother was twice his

age. What is his mother’s age now?

6. If 8 workers can plant a garden in 6 hours, how many workers would it have

taken to do it in 4 hours?

7. If one pipe can fill a tank in hrs a second pipe in 3 ½ hrs and a third pipe in 5 hrs,

how long will it take to fill the tank if all three pipes are used?​

Answer 1

Answer:

1. 21-........ ..................