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Home Page To 3 Rs To algebra
Presentation by Howard C. McAllister. Copyright 1996

Problem: Bill has 4 times as many apples as
Mary, who has 3. How many apples does Bill have?

The problem asks for the number of apples
Bill has. The first sentence tells us that
This equation asks for the
number of apples Mary has.
This is stated to be

The result of substitution is

The result of doing the arithmetic is

Ignore the
givens till
they are
asked
for.

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COPY and PASTE can be used to effect substitution.
Copy the top equations and paste it in the substitution box.
Then copy the right side of each indented equation, starting with the first one, and paste them on the appropriate symbol in the substitution box.
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