$20.00-$19.35=0.65

You must do a guess and check!

0.65 cents is his change

He could have gotten:

2 Quarters (50 cents)=(2x25) Because there are two quarters and each are 25 cents

1 Dime (10 cents)=(1x10) because there is one dime and they are 10 cents

5 Pennies (5 cents)=(1x5) because pennies are 5 pennies and they are 1 cent a piece

CHECK

5+2+1 =8

8=8

So we have the correct number of coins

(2x25) + (1x10) + (5x1) =65

50+10+5=65

65=65

So we have the correct amount of change in cents

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The answer and workout is in the picture

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Step one:

12h-7=7h+18

12h-7h-7+7=7h-7h+18+7 Additive inverse

5h=25

Step two:

5h=25

5/5h=25/5 Multiplicative inverse

h=5