30 xþ 150 ¼ 300
30 xþ 150 150 ¼ 300 150
30 x¼ 150
301 x
301
¼
150
30
x¼5 nickels
xþ 6 ¼ 5 þ 6 ¼11 quarters
- Letx¼the number of quarters and 32x¼the number of nickels;
then the value of the quarters is 25xand the value of the nickels
is 5(32x).
25 xþ 5 ð 32 xÞ¼ 3 : 80 100
25 xþ 160 5 x¼ 380
20 xþ 160 ¼ 380
20 xþ 160 160 ¼ 380 160
20 x¼ 220
201 x
201
¼
220
20
x¼11 quarters
32 x¼ 32 11 ¼21 nickels
- Let x¼the number of pennies, 2x¼the number of dimes, and
xþ 3 ¼the number of nickels; then the value of the pennies is 1x,
the value of the dimes is 10 2 x, and the value of the nickels is 5(xþ3).
xþ 10 2 xþ 5 ðxþ 3 Þ¼ 1 : 97 100
xþ 20 xþ 5 xþ 15 ¼ 197
26 xþ 15 ¼ 197
26 xþ 15 15 ¼ 197 15
114 LESSON 11 Solving Coin Problems