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Sergeeva-Olga [200]
3 years ago
7

Johnny has 15 toys with a total value of $125. If some of Johnny's toys are worth $5 and the others are worth $10, how many toys

does Johnny have that are worth $5?
Business
1 answer:
Luden [163]3 years ago
3 0

Answer:

5TOYS ARE WORTH 15

10TOYS ARE WORTH 5

Explanation:

We have to set up the equation system

we know that both kind of toys total 15 and their monetary value is 225

x + y = 15 \\ 15x + 5y = 125

then we clear y in the first equation and replace it in the second equation

y = 15 - x \\ 15x + 5(15 - x) = 125

we solve for x in the second:

15x - 5x = 125 -5 \times 15 \\x = 50 \div 10 = 5

Next we solve for y in the first equation

y = 15 - x= 15 - 5 = 10

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