Solve for L
L = \frac{113}{10} = 11\frac{3}{10} = 11.3
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28\times 4+1=2L\left(2\times 2+1\right)
Multiply both sides of the equation by 4, the least common multiple of 4,2.
112+1=2L\left(2\times 2+1\right)
Multiply 28 and 4 to get 112.
113=2L\left(2\times 2+1\right)
Add 112 and 1 to get 113.
113=2L\left(4+1\right)
Multiply 2 and 2 to get 4.
113=2L\times 5
Add 4 and 1 to get 5.
113=10L
Multiply 2 and 5 to get 10.
10L=113
Swap sides so that all variable terms are on the left hand side.
L=\frac{113}{10}
Divide both sides by 10.
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