Beth sold half of her comic books and then bought nine more. She now had 28. With how many did sh begin?
2 answers:
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First of all, let's derive all the quantities. We know that Jermaine has tokes. So, if you have 4 more tokens, it means that you can start from this quantity, and add 4. In formula Karen has
tokens.
By the same logic, 5 fewer than a certain quantity means to subtract 5 from that quantity, so Raul has
tokens.
Now we're ready to write the ratio between the two numbers: simply put Karen's tokens at the numerator and Raul's tokens
at the denominator and substitute
and
with the expressions we just found:
Obviously, since we don't know the value of , we can't say exactly how many tokens anyone has, or computing the ratio numerically, but only express it in terms of
.