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l/4-3l=100
We move all terms to the left:
l/4-3l-(100)=0
We add all the numbers together, and all the variables
-3l+l/4-100=0
We multiply all the terms by the denominator
-3l*4+l-100*4=0
We add all the numbers together, and all the variables
l-3l*4-400=0
Wy multiply elements
l-12l-400=0
We add all the numbers together, and all the variables
-11l-400=0
We move all terms containing l to the left, all other terms to the right
-11l=400
l=400/-11
l=-36+4/11
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