I can use some help on understanding the steps on writing equations.?

Question

Three numbers added together total 500. The second number is fourt times the first, and the third is five times the second. Find each number.
I keep trying x + 4x + 5x =500 but it's not working.

Answer 1

Let the first number = x

Then the 2nd = 4x

the third = 5(4x) = 20x

Then
x + 4x + 20x = 500

25x = 500

x = 20 first number

4x = 80 second number

20x = 400 third number
,.

Answer 2

500=x+4x+20; 5 times the second
x=20
20, 80, 400

Answer 3

x + 4x + 5(4x) would be more correct.

x + 4x + 20x = 500

25x = 500

x = 20

20 + 4(20) + 5(4 x 20) = 500

20 + 80 + 400 = 500

Answer 4

easy..!!!
number 1 x 20 x+4x+20x = 500
number 2 4x 80 25x = 500
number 3 5(4x) 400 x = 20
total 500

Answer 5

If 4x is the second then thats 5 times 4x so thats 20x so its really x+4x+20x=500 or 25x=500 so x=20

Answer 6

Your problem is that you are setting up the 3rd # as 5 times the first instead of 5 times the 2nd. so you're terms should be written as
x=1st # 4x=2nd # 5(4x)=3rd # . Your equation would be written as :
x+4x+20x=500
25x=500
x=20; 4x=80, 20x=400

Answer 7

you're assuming the 3 numbers are all the same, but they're not....
x+y+z=500
you know:
y=4*x (second number is 4 times the first)
z=5y (third number is 5 times the second)

now plug and chug

x + y + z = 500
x + 4x + 5y = 500
5x + 5(4x) = 500
5x + 20x = 500
25x=500
x=20
y=4x=80
z=5y=400

Answer 8

ah dere is the mistake the third no. is five times the second
the 2nd no is 4x
so the 3rd no is 5*4x
if its jus 5x it will be five times the 1st no
so the eq is x+4x+20x=500
25x=500
x=500/25 =20
i think u cld find the oder two values by substitutitng the value of x

Answer 9

your third number is five time the second. so, 5(4x). it's supposed to be 20x.

x+4x+20x=500
25x=500
x=20

Answer 10

x + 4x + (4x)5 = 500