Question

Tìm phân số a/b, biết:

5 - ( a/b + 1/2) = 2 và 1/3

Answer 1

5 - (a/b + 1/2) = 7/3 

5 - a/b - 1/2 = 7/3 

9/2 - a/b = 7/3 

27/6 - a/b = 14/6 

a/b = 27/6 - 14/6 

a/b = 13/6 

Answer 2

5 - (a/b+1/2) = 2 và 1/3

5 - a/b - 1/2 = 7/3

5 - 1/2 - a/b = 7/3

9/2 - a/b = 7/3

a/b = 9/2 - 7/3

a/b = 13/6

Answer 3

\(5-\left(\frac{a}{b}+\frac{1}{2}\right)=2\)

\(\frac{a}{b}+\frac{1}{2}=5-2=3\)

\(\frac{a}{b}=3-\frac{1}{2}=\frac{6}{2}-\frac{1}{2}=\frac{5}{2}\)

Vậy ............

\(5-\left(\frac{a}{b}+\frac{1}{2}\right)=\frac{1}{3}\)

\(\frac{a}{b}+\frac{1}{2}=5-\frac{1}{3}=\frac{14}{3}\)

\(\frac{a}{b}=\frac{14}{3}-\frac{1}{2}=\frac{25}{6}\)

Vậy ...............

Answer 4

ab = 13/6