TUDIvIl P ...

lesson 34)

The piggybank had $25.65 in dimes and

quarters. If there were 20 more quarters

than dimes, how many dimes were in the

piggybank?

Step-by-step explanation:

0.10d + 0.25q = 25.65

q = d + 20

0.10d + 0.25 (d + 20) = 25.65

0.10d + 0.25d + 5 = 25.65

0.35d = 25.65 - 5

0.35d = 20.65

d = 20.65 / 0.35

d = 59 <== = there were 59 dimes

q = d + 20

q = 59 + 20

q = 79 ... there were 79 quarters