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GaryK [48]
3 years ago
15

A preschool playground has both bicycles and tricycles. There is a total of 30 seats and 70 wheels. how many bicycles are there?

how many tricycles are there? ​

Mathematics
2 answers:
hoa [83]3 years ago
5 0

the solution of this question is in the picture.

Delicious77 [7]3 years ago
3 0

Answer:

20 bicycles and 10 tricycles.

Step-by-step explanation:

Let the number of bicycles and tricycles be x and y respectively.

Each vehicle has 1 seat.  Each bicycle 2 wheels and each tricycle 3 wheels.

Then we have the system of equations:

x + y = 30 ............ (1)

2x + 3y = 70.........(2)

Multiply the first equation by -2:

-2x - 2y = -60......(3)

Adding (2) + (3):

y = 10

Substituting for y in equation (1):

x + 10 = 30

x = 20.    

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