Solve for u_0
u_{0}=u_{1000}-300
Solve for u_1000
u_{1000}=u_{0}+300
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u_{1000}=u_{0}+300
Multiply 3 and 100 to get 300.
u_{0}+300=u_{1000}
Swap sides so that all variable terms are on the left hand side.
u_{0}=u_{1000}-300
Subtract 300 from both sides.
u_{1000}=u_{0}+300
Multiply 3 and 100 to get 300.
Examples
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Limits
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