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14-04-2017
Mathematics

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jason has 25 coins in is pocket total change is 505 how many dime and quarters he has?

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Аноним Аноним

14-04-2017

10x+25y=505
x+y=25

10x+25y=505
-10(x+y)=-10(25)

15y=255
y = 17

Plug back in.

x+17=25

x=8

8 dimes, 17 quarters

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