Question

Please help pleaseeeee

Answer 1

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`\bf \cfrac{3}{4}\cdot \cfrac{1}{b}=\cfrac{1}{2}\cdot \cfrac{1}{1}\implies \cfrac{3}{4b}=\cfrac{1}{2}\implies 6=4b\implies \cfrac{6}{4}=b\implies \cfrac{3}{2}=b`