02 - Problems involving sum of two numbers

Problem 3
A man bought a cellphone and laptop for P50,000.00, paying three times as much for the laptop as for the cellphone. How much did each cost?
 

Solution 3

Problem 4
Two boys, counting their money, found that together they had P372, and that Rody had five times as much as Mar. How much had each?
 

Solution 4