Y : 5 + Y : 3 + Y = 69
Y : (5 + 3 + 1) = 69
Y : 9 = 69
Y = 69 . 9
Y = 621
\(y:5+y:3+y=69\)
\(y\times\frac{1}{5}+y\times\frac{1}{3}+y=69\)
\(y\times\left(\frac{1}{5}+\frac{1}{3}+1\right)=69\)
\(y\times\frac{23}{15}=69\)
\(y=69:\frac{23}{15}=69\times\frac{15}{23}=45\)
Vậy y=45
#) Giải :
\(Y:5+Y:3+Y=69\)
\(Y\times\frac{1}{5}+Y\times\frac{1}{3}+Y=69\)
\(Y\times\left(\frac{1}{5}+\frac{1}{3}+1\right)=69\)
\(Y\times\frac{23}{15}=69\)
\(Y=69:\frac{23}{15}\)
\(Y=45\)
Nếu cs sai sót mog chỉ bảo :)
