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4(l-1)+2(l+1)=0
We simplify the equation to the form, which is simple to understand
4(l-1)+2(l+1)=0
Reorder the terms in parentheses
+(+4l-4)+2*(l+1)=0
Remove unnecessary parentheses
+4l-4+2+*(+l+1+)=0
Reorder the terms in parentheses
+4l-4+(+2l+2)=0
Remove unnecessary parentheses
+4l-4+2l+2=0
We move all terms containing l to the left and all other terms to the right.
+4l+2l=0+4-2
We simplify left and right side of the equation.
+6l=+2
We divide both sides of the equation by 6 to get l.
l=0.333333333333
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