Solve for a
a=0
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a\times \frac{4}{5}=0\times 5
Multiply 220 and 0 to get 0.
a\times \frac{4}{5}=0
Multiply 0 and 5 to get 0.
a=0
Product of two numbers is equal to 0 if at least one of them is 0. Since \frac{4}{5} is not equal to 0, a must be equal to 0.
Examples
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Matrix
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Limits
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