Question

Answer 1

a) x = 5/6 - 1/2

x = 1/3

 

x = 3/2 - 1/4

x = 5/4

 

x = 5/6 - 1/3

x = 1/2

b)

x = 4/5 - 2/7

x = 18/35

 

x = 3/10- 1/5

x = 1/10

 

x = 3/2- 8/9

x = 11/18

c) x = 3/2 : 4/5

x = 15/8

 

x = 11/4 x 3/2

x= 33/8

 

x =25/3 : 5/6

x = 10

d) x = 8/9 : 5/7 

x = 56/45

 

x = 2/9 : 4/7

x = 7/18

 

x = 15/7 : 3/7

x = 4

Answer 2

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2.

a,

\(\dfrac{1}{2}+x=\dfrac{5}{6}\)

\(x=\dfrac{5}{6}-\dfrac{1}{2}\)

\(x=\dfrac{2}{6}=\dfrac{1}{3}\)

 

\(x+\dfrac{1}{4}=\dfrac{3}{2}\)

\(x=\dfrac{3}{2}-\dfrac{1}{4}\)

\(x=\dfrac{5}{4}\)

 

\(\dfrac{5}{6}-x=\dfrac{1}{3}\)

\(x=\dfrac{5}{6}-\dfrac{1}{3}\)

\(x=\dfrac{3}{6}=\dfrac{1}{2}\)

b,

\(x+\dfrac{2}{7}=\dfrac{4}{5}\)

\(x=\dfrac{4}{5}-\dfrac{2}{7}\)

\(x=\dfrac{18}{35}\)

 

\(x-\dfrac{1}{5}=\dfrac{3}{10}\)

\(x=\dfrac{3}{10}+\dfrac{1}{5}\)

\(x=\dfrac{5}{10}=\dfrac{1}{2}\)

 

\(\dfrac{3}{2}-x=\dfrac{8}{9}\)

\(x=\dfrac{3}{2}-\dfrac{8}{9}\)

\(x=\dfrac{11}{18}\)

c,

\(x\times\dfrac{4}{5}=\dfrac{3}{2}\)

\(x=\dfrac{3}{2}:\dfrac{4}{5}\)

\(x=\dfrac{15}{8}\)

 

\(x:\dfrac{3}{2}=\dfrac{11}{4}\)

\(x=\dfrac{11}{4}\times\dfrac{3}{2}\)

\(x=\dfrac{33}{8}\)

 

\(\dfrac{25}{3}:x=\dfrac{5}{6}\)

\(x=\dfrac{25}{3}:\dfrac{5}{6}\)

\(x=10\)

d,

\(\dfrac{5}{7}\times x=\dfrac{8}{9}\)

\(x=\dfrac{8}{9}:\dfrac{5}{7}\)

\(x=\dfrac{56}{45}\)

 

\(x\times\dfrac{4}{7}=\dfrac{2}{9}\)

\(x=\dfrac{2}{9}:\dfrac{4}{7}\)

\(x=\dfrac{7}{18}\)

 

\(\dfrac{15}{7}:x=\dfrac{3}{7}\)

\(x=\dfrac{15}{7}:\dfrac{3}{7}\)

\(x=5\)