Question 1035905
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1. Two books cost 220 Philippine peso and one cost 20 Philippine peso more than the other. Find the cost of each.


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x + y = 220,    (1)
x - y =  20.    (2)

To solve, add equations (1) and (2).

Then, I think, everybody in Philippine knows what to do next.
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2. There are 10 coins in a purse consisting of 5 Philippine peso and 1 Philippine peso denominations. 
If the total amount of the coins is 26 Philippine peso then how many coins of each kind are there in the purse.


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 x +  y = 10,     (1)    (there are 10 coins, x of 5-peso and y of 1-peso)
5x + 1y = 26.     (2)    (the "value" equation)

Distract equation (1) from equation (2).

From this point, complete the assignment yourself.  Good luck!
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