Solve for l
l=9
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28=2l+10
Multiply 2 and 5 to get 10.
2l+10=28
Swap sides so that all variable terms are on the left hand side.
2l=28-10
Subtract 10 from both sides.
2l=18
Subtract 10 from 28 to get 18.
l=\frac{18}{2}
Divide both sides by 2.
l=9
Divide 18 by 2 to get 9.
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