I promise I will mark as brainiest if a speed of a car increase its average speed in a journey of 200 miles by 5 mile/hour the journey will end with a difference of one hour less, so what is the original speed of the car ?

Step-by-step explanation:

Hello

Let's note the original speed of the car v

it means that in 1 hour he is going v miles

so to go 200 miles it takes ( in hour)

If the speed of the car is v+5 than to go 200 miles it takes (in hour)

and this time is one hour less so we can write

We can multiply by v(v+5) both parts of the equation so

Only one is positive and this is is

So the original speed is 29.22144... mph

Hope this helps.

Do not hesitate if you need further explanation.

Thank you