Solve for a
a=0
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448a-672a=0
Subtract 672a from both sides.
-224a=0
Combine 448a and -672a to get -224a.
a=0
Product of two numbers is equal to 0 if at least one of them is 0. Since -224 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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