Problema Solution
Ruth can buy 5 bottles of water and 2 cans of soda for $5.90. She can buy 3 bottles of water and 7 cans of soda for $10.21. Find the cost of 1 bottle of water and 1 can of soda.
Answer provided by our tutors
1)5w+2s=5.90
2)3w+7s=10.21
5w+2s=5.90
5w=5.90-2s
w=(5.90-2s)/5
put w on 2)
3w+7s=10.21
3((5.9-2s)/5))+7s=10.21
17.7-6s+35s=51.05
29s=51.05-17.7
s=1.15
w=(5.9-2(1.15))/5
w=0.72
s=sodaļ¼w=water