0,5.x+1/8.x=75%
1/2.x+1/8.x=3/4
x.(1/2+1/8)=3/4
x.5/8=3/4
x=3/4:5/8
x=3/4.8/5
x=6/5
vậy x=6/5
\(0,5.x+\frac{1}{8}.x=75\%\)
\(\left(0,5+\frac{1}{8}\right).x=\frac{3}{4}\)
\(\frac{5}{8}.x=\frac{3}{4}\)
\(x=\frac{3}{4}:\frac{5}{8}\)
\(x=\frac{6}{5}\)
Học tốt
\(0,5.x+\frac{1}{8}.x=75\%\)
\(\frac{1}{2}.x+\frac{1}{8}.x=\frac{75}{100}\)
\(x.\left(\frac{1}{2}+\frac{1}{8}\right)=\frac{3}{4}\)
\(x.\frac{5}{8}=\frac{3}{4}\)
\(x=\frac{6}{5}\)
