Solve for r
r=0
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10=10+r
Anything divided by one gives itself.
10+r=10
Swap sides so that all variable terms are on the left hand side.
r=10-10
Subtract 10 from both sides.
r=0
Subtract 10 from 10 to get 0.
Examples
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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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