Abike shop sells rolling strollers for runners with babies, with a total of 28 in the store. some of the strollers have 3 wheels and some have 4. if there are 100 wheels, how many 3-wheel strollers are there?

a.
25
b.
12
c.
3
d.
16

Let x be the 3 wheels and y be the 4 wheels. So that x + y = 28 and 3x + 4y = 100. By solving it using the formula, y = 28-x, the answer will be x =12. So the number of strollers with 3 wheels are 12 and the ones with 4 wheels are 16. Thank you for posting your question. I hope this answer helped you. Let me know if you need more help. 

Option: B is the correct answer.

                        B.  12

Step-by-step explanation:

Let the number of 3 wheel strollers be: x

and the number of 4 wheel strollers be: y

Now  we are given that:

There are a total of 28 strollers in the store.

That means:

                 x+y=28(1)

and also, the total number of wheels are: 100

This means that:

            3x+4y=100(2)

Using equation (1) we have:  y=28-x

On putting the value of y in equation (2) we get:

3x+4(28-x)=100

⇒  3x+112-4x=100

⇒  -x+112=100

⇒  x=112-100

⇒  x=12

         Hence, the number of 3-wheel strollers are:

                                  12

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Hmmm i had this before , give me a sec