SOLUTION: Bertha has 35 postage stamps. Some are valued at the old postage rate of 55cents and some are valued at the new postage rate of 60 cents. If the total value of the stamps is $20.10

SOLUTION: Bertha has 35 postage stamps. Some are valued at the old postage rate of 55cents and some are valued at the new postage rate of 60 cents. If the total value of the stamps is $20.10

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Question 446898: Bertha has 35 postage stamps. Some are valued at the old postage rate of 55cents and some are valued at the new postage rate of 60 cents. If the total value of the stamps is $20.10, find the number of 5cent stamps that must be purchased in order to use up all the 55cent stamps.
Answer by rwm(914) (Show Source): You can put this solution on YOUR website!
x+y=35
55x+60y=2010
x=18 y=17

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