Question

hay sắp xếp các phân số sau: 351/353;2008/2010;8/11;71/74

tìm y:

y+y nhân 1/3\2/9 +y \2/7=252

Answer 1

1.\(\frac{8}{11};\frac{71}{74};\frac{351}{353};\frac{2008}{2010}.\)
2.
\(y+y\times\frac{\frac{1}{3}}{\frac{2}{9}}+\frac{y}{\frac{2}{7}}=252\)
\(y+y\times\frac{1}{3}\times\frac{9}{2}+y\times\frac{7}{2}=252\)
\(y+\frac{3y}{2}+\frac{7y}{2}=252\)
\(\frac{2y}{2}+\frac{10y}{2}=252\)
\(\frac{12y}{2}=252\)
\(12y=504\)
\(y=\frac{504}{12}=42\)