2l+2(1/2*l+1)=30

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Solution for 2l+2(1/2*l+1)=30 equation: 



2l+2(1/2l+1)=30

We move all terms to the left:

2l+2(1/2l+1)-(30)=0



Domain of the equation: 2l+1)!=0

l∈R



We multiply parentheses

2l+2l+2-30=0

We add all the numbers together, and all the variables

4l-28=0

We move all terms containing l to the left, all other terms to the right

4l=28

l=28/4

l=7

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