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LESSON 4 : PROBLEM SOLVING USING SYSTEMS OF EQUATIONS
Systems of equations are
often used to solve problems in math, science and business. First we must build a mathematical model
of the problem. The following example illustrates how this
is done. It is followed by a blue box
outlining the key steps in the strategy.
Direction |
Distance |
Speed |
Time |
Equation(d=st) |
upsteam |
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downstream |
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Distance |
Speed |
Equation(t=d/s) |
At 50 mph |
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At 60 mph |
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