2/3*x+x=125%
x(2/3+1)=125%
x*5/3=125%
đổi 125%=125/100=5/4
=>x*5/3=5/4
x=5/4:5/3
x=3/4
vậy x=3/4
\(\dfrac{2}{3}.x+x=125\%\)
\(x.\left(\dfrac{2}{3}+1\right)=\dfrac{5}{4}\)
\(x.\dfrac{5}{3}=\dfrac{5}{4}\)
\(x=\dfrac{5}{4}:\dfrac{5}{3}\)
\(x=\dfrac{3}{4}\)