Solve for z
z=0
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2z+4z=0
Add 4z to both sides.
6z=0
Combine 2z and 4z to get 6z.
z=0
Product of two numbers is equal to 0 if at least one of them is 0. Since 6 is not equal to 0, z must be equal to 0.
Examples
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Matrix
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Limits
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