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2l+2(80)=550
We simplify the equation to the form, which is simple to understand
2l+2(80)=550
Reorder the terms in parentheses
2l+(+160)=550
Remove unnecessary parentheses
+2l+160=+550
We move all terms containing l to the left and all other terms to the right.
+2l=+550-160
We simplify left and right side of the equation.
+2l=+390
We divide both sides of the equation by 2 to get l.
l=195
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