You can put this solution on YOUR website!
Let x=speed of first car, y=speed of second car
You're on the right track since you have the correct equations set up
Start with the given system
into the first equation. In other words, replace each
. Notice we've eliminated the
variables. So we now have a simple equation with one unknown.
Combine like terms on the left side
Subtract 16 from both sides
Combine like terms on the right side
Divide both sides by 4 to isolate y
Now that we know that
, we can plug this into
So our answer is
So the first car was going 56 mph and the second car was going 48 mph