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It will take 7 hours for car B to catch up to Car A.

Step-by-step explanation:

So if you write the the two equations out:

You'll want to assume that x is how many hours and y is how many km.

The reason car B has, -140, is because car A is in front of it by two hours and in those two hours it reached 140km. Meaning that Car B is starting at 140 km behind Car A.

If you graph these two equations out you'll realize that they intersect at the point (7, 490). Meaning that Car B caught up with Car A after 7 hours and both cars had traveled 490km.

1 x=22.52

2: 65/39=604+39x

65x-39x=604

26x=604

x=604/26

×=23.23

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step-by-step explanation: