Question

[Trần Thị Bảo Ngân]

tìm y biết : 7/4 - y * 5/6 = 1/2 = 1/3 

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Answer 1

[Không Tên]

7/4 - y* 5/6 = 1/2 - 1/3

\(\Leftrightarrow\) y*5/6 = 7/4 -1/2 + 1/3 = 19/12

\(\Leftrightarrow\)y = 19/12 : 5 /6 =19/10

vay y = 19/10

Answer 2

[Đỗ Đức Đạt]

\(\frac{7}{4}-Yx\frac{5}{6}=\frac{1}{2}+\frac{1}{3}\)

\(\frac{7}{4}-Yx\frac{5}{6}=\frac{3}{6}+\frac{2}{6}\)

\(\frac{7}{4}-Yx\frac{5}{6}=\frac{5}{6}\)

\(Yx\frac{5}{6}=\frac{7}{4}-\frac{5}{6}\)

\(Yx\frac{5}{6}=\frac{42}{24}-\frac{20}{24}\)

\(Yx\frac{5}{6}=\frac{22}{24}\)

\(Yx\frac{5}{6}=\frac{11}{12}\)

       \(Y=\frac{11}{12}:\frac{5}{6}\)

       \(Y=\frac{11}{12}x\frac{6}{5}\)

       \(Y=\frac{66}{60}\)

        \(Y=\frac{11}{10}\)