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4+l/2=-3
We move all terms to the left:
4+l/2-(-3)=0
We add all the numbers together, and all the variables
l/2+7=0
We multiply all the terms by the denominator
l+7*2=0
We add all the numbers together, and all the variables
l+14=0
We move all terms containing l to the left, all other terms to the right
l=-14
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