3. Tina has P100.00 worth of coins in 1-peso and 5-peso denominations. Write a linear equation that will determine the number of 5-peso coins. How many 5-peso coins does she have if she has P60.00 worth of 1-peso coins?
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3. Tina has P100.00 worth of coins in 1-peso and 5-peso denominations. Write a linear equation that will determine the number of 5-peso coins. How many 5-peso coins does she have if she has P60.00 worth of 1-peso coins?
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Answer:
There are 8 five-peso coins
Step-by-step explanation:
Let x= the number of 1-peso coins
Let y= the number of 5-peso coins
The linear equation:
x + 5y = 100
If tthere are 60 one-peso coins or x= 60 then
60 + 5y = 100
5y = 100 -60
5y = 40
y= 40/5
y= 8 There are 8 five-peso coins