Answer:
<em>w</em><em> </em><em>=</em><em> </em><em>1</em><em>0</em>
Step-by-step explanation:
Solving steps are shown in above pic. (source: Photomath)
P=2(l + b)
P=2l + 2b
P-2b=2l
P-2b/2=l
C is your answer

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