Question

  Tìm x biết \(\frac{x-9}{35}=\frac{20}{28}\) 

Answer 1

\(\Rightarrow28\left(x-9\right)=20.35\Rightarrow28x-252=700\Rightarrow28x=952\Rightarrow x=34\)

Answer 2

\(\frac{x-9}{35}=\frac{20}{28}=\frac{5}{7}=\frac{25}{35}\)

=>x-9=25

=>x=25+9

=>x=34

vậy x=34

Answer 3

x-9/35=20/28

28x(x-9)/980=700/980

28xX-28x9=700

28xX-252=700

28xX=700+252

28xX=952

x=952/28

x=34