Question

x/120=30/48

25/35=15/x

Answer 1

a: =>x/120=5/8

=>x=75

b: =>15/x=5/7

=>x=21

Answer 2

\(\dfrac{x}{120}=\dfrac{30}{48}\)

\(\Rightarrow x\times48=30\times120\)

\(\Rightarrow x\times48=3600\)

\(\Rightarrow x=3600\div48\)

\(\Rightarrow x=75\)

\(---------------\)

\(\dfrac{25}{35}=\dfrac{15}{x}\)

\(\Rightarrow x\times25=15\times35\)

\(\Rightarrow x\times25=525\)

\(\Rightarrow x=525\div25\)

\(\Rightarrow x=21\)