Solve for y, z, a
a=0
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z=0 y=0 a=z
Reorder the equations.
a=0
Substitute 0 for z in the equation a=z.
y=0 z=0 a=0
The system is now solved.
Examples
Quadratic equation
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Trigonometry
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Linear equation
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Matrix
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Simultaneous equation
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Integration
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Limits
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