Asked by Dottie
Salina had some local and foreign stamps. The ratio of the number of local stamps to the number of foreign stamps was 3:4. She bought 21 more local stamps and the ratio became 9:8.
a. How many foreign stamps did Salina have?
b. How many local stamps did Salina have in the end?
a. How many foreign stamps did Salina have?
b. How many local stamps did Salina have in the end?
Answers
Answered by
Steve
using d for domestic and f for foreign,
d/f = 3/4
(d+21)/f = 9/8
42 local stamps
56 foreign stamps
check: 42/56 = 3/4
63/56 = 9/8
d/f = 3/4
(d+21)/f = 9/8
42 local stamps
56 foreign stamps
check: 42/56 = 3/4
63/56 = 9/8