The sum of three numbers is 84. the second number is twice the first, and the third is 4 more than the second. find the numbers.

16, 32, 36

Step-by-step explanation:

If you set up an equation using x as the first number you can solve for x then follow the directions.

For example...

1st number is x

2nd number is 2x

Third number is 2x+4

Put it all in an equation to solve for x:

x + (2x) + (2x+4) = 84

Combine like terms, then solve.

5x + 4 = 84

Subtract four from both sides

5x = 80

Divide both sides by 5

x = 16

Now just plug x into the expressions that were created for each number, and you have your answers.

Let me know if you need further explanation.