Solve for L
L=0
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1-L-L=1
Subtract L from both sides.
1-2L=1
Combine -L and -L to get -2L.
-2L=1-1
Subtract 1 from both sides.
-2L=0
Subtract 1 from 1 to get 0.
L=0
Product of two numbers is equal to 0 if at least one of them is 0. Since -2 is not equal to 0, L must be equal to 0.
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