bob has three times as many baseball cards as bill. together they have a total of 68 cards. how many cards does bob have?

1 answer:

8 0

X = bob
y = bill

x + y = 68
x = 3y

3y + y = 68
4y = 68
y = 68/4
y = 17 <== Bills cards

x = 3y
x = 3(17)
x = 51 <=== Bobs cards

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