Question

Please, i actually need help right now! 9th grade algebra 1.
Davids neighborhood is having a yard sale. Many of the neighbors brought bicycles and tricycles their children had out grown. The number of bicycles was 6 more than 3 times the number of tricycles. If there were 84 total wheels, how many tricycles were at the yard sale?

Answer 1

Answer:

8 tricycles

Step-by-step explanation:

Let x be the amount of bicycles and y be the amount of tricycles

We can set up a system of equations:

x=3y+6

2x+3y=84

We can solve using substitution

2(3y+6)+3y=84

Distribute

6y+12+3y=84

Combine like terms

9y+12=84

Subtract 12 from both sides

9y=72

Divide 9 from both sides

y=8

There were 8 tricycles at the yard sale