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jenn8055
03.02.2020 •
Mathematics
Jacob has exactly 84 cents in his pocket.he only has dimes and quartere. how many pennies does he have if he has 3 dimes
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Ответ:
3 times 10=30
30 cents are dimes
84=dimes+quarters
84=30+quarters
minus 30
54=quartesr
that can't be right
quartesr go like this
1 quarter=25
2 quarter=50
3 quarters=75
maybe there are pennies even though a penny is neither a dime nor a quarter
2 quarters make 50
4 pennies make the last 4
I guess 4 pennies
Ответ:
-Y = 9 ---> X = Y+9
5Y = 3X+7
5Y = 3(Y+9) + 7
5Y = 3Y + 27 + 7
5Y = 3Y + 34
2Y = 34
Y=17
X=26
Step-by-step explanation:
Hope this helps!