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Question:

# Jordy buys 5 lottery tickets for $17.50. How much would Jordy pay if he wanted to buy 7 lottery tickets? A$24.50
explanation

This is a proportion problem and the given information allows us to formulate the equation below:
5 tickets/$17.50 = 7 tickets/x, where x is the cost of 7 lottery tickets. We can solve this equation by first cross-multiplying. 5 tickets × x = 7 tickets × 17.50$
Carrying out the product on the right-hand side, we get;
5 tickets × x = 122.5 tickets·$We can solve for x by dividing both sides of the equation by 5 tickets. (5 tickets × x)/5 tickets = 122.5 tickets·$/5 tickets
Carrying out the division, we get a 1 on the left-hand side and a 24.5 on the right-hand side.
1x= 24.5 $We can drop the 1 next to x, to get x= 24.5$. It would cost Jordy \$24.50 to buy 7 lottery tickets.

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