Question

the compound ratio of 5:8and3:7 is 45:x then x=
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Answer 1

Answer:

$\frac{ \frac{5}{8} }{ \frac{3}{7} } = \frac{45}{x} \\ \\ \frac{35}{24} = \frac{45}{x} \\ \\ 35x = 24 \times 45 \\ \\ x = \frac{216}{7}$