Carly needs $149 to buy a skateboard. She already has $52. She earns money washing cars for $20 a car.
Carly says that if she washes 5 cars she will have enough money to buy the skateboard.
Use the drop-down menus to explain how to solve this problem.
First multiply
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× $20 to find how much money Carly will earn washing cars. Then add this amount to
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to find how much money Carly has in all. Finally,
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the total to
see if it is enough to buy the skateboard. If not, repeat the process until Carly has enough money.
solve for the number of cars Carly needs to wash in order to have enough money to buy the skateboard.
First multiply $20 to find how much money Carly will earn washing cars. Then add this amount to $52 to find how much money Carly has in all. Finally, divide the total to $149 to solve for the number of cars Carly needs to wash.
So, the equation to solve is: ($20 * Number of Cars) + $52 = $149.
To solve for the number of cars, subtract $52 from both sides of the equation to isolate the term with the variable: ($20 * Number of Cars) = $149 - $52.
Simplifying this equation gives: ($20 * Number of Cars) = $97.
Now, divide both sides of the equation by $20 to solve for the number of cars: Number of Cars = $97 / $20 = 4.85.
Since Carly can't wash a fraction of a car, she would need to wash 5 cars in order to have enough money to buy the skateboard.