Question

The sum of the speeds of two trains is 719.3 miles per hour. If the speed of the first train is 8.7 mph faster than that of the second train find the speeds of each.

What is the speed of the first train?

Answer 1

The sum of the speeds of two trains is 719.3 miles per hour. If the speed of the first train is 8.7 mph faster than that of the second train find the speeds of each.
What is the speed of the first train?

Answer 2

First train 364, second train 355.3

Explanation:

Let's me just say

First train = x

Second train = y

Easier to type like that

So

x + y = 719.3

they say " first train is 8.7 mph faster than that of the second train "

Therefore

x = y + 8.7

Now u have these two equations

x + y = 719.3

x = y + 8.7

Now since u know what is x, just put it in your first equation

x + y = 719.3

y + 8.7 + y= 719.3

2y = 710.6

= 355.3

Therefore the speed of the first train is

x + y = 719.3

x + 355.3 = 719.3

x =364