Problem
A canning factory is able to produce 4,800 cans of soup in one hour. At this rate, in how many minutes can the canning factory produce 400 cans?
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So What?
Math questions involving two equations and two unknowns can usually be combined into one equation with one unknown.
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Fact:
Math questions involving two equations and two unknowns can usually be combined into one equation with one unknown.
What this means to me:
When you see a question with two equations and two unknowns, look to see if you can combine the equations by adding one equation to the other or subtracting one equation from the other. Once you can get the equation down to a single variable, you can solve normally (by isolating the variable).
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