Answered

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Dave works two jobs. He works at the grocery store making $12 per hour and works at the car wash making $15 per hour. If he worked a total of 25 hours and made $333, how many hours did he work at the car wash? Set up the two equations and then solve.

Sagot :

Answer:

11 hours

Step-by-step explanation:

let he works at first store x hours and at car wash y hours. Then

x+y=25

multiply by 4

4x+4y=100  ...(1)

12x+15y=333

divide by 3

4x+5y=111   ... (2)

(2)-(1) gives

y=111-100=11

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