7. Alice has a coin purse containing $5.40 in dimes and quarters. There are 24 coins all together. How
1 answer:
Answer:
20 quarters 4 dimes
Step-by-step explanation:(Elimination method)
I will replace 0.10, 0.25 and 5.4 by 10 25 and 540 to get rid of the decimals
D +Q = 24
10D + 25Q = 540
_________________________
Multiply the first equation by -10
-10D -10Q = -240
10D + 25Q = 540 Subtract the fractions:
0 + 15Q = 300
Q= 20
24-20 = 4 4 dimes
4 dimes =$ 0.40
20 quartes = $5
$5+$0.40=$ 5.40
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