Answer:
b=4
Step-by-step explanation:
Format rewrite:
Solve for 'b', when [tex]\frac{5}{b} =\frac{45}{36}\\\\\mathrm{Apply\:fraction\:cross\:multiply:\:if\:}\frac{a}{b}=\frac{c}{d}\mathrm{\:then\:}a\cdot \:d=b\cdot \:c\\\\5\cdot \:36=b\cdot \:45\\180=b\cdot \:45\\\\divide(45)\\\\\\\\\\b=4[/tex]
Hoped this help ya
<3
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