Question

tim x,biet:

a,x+1/3 =3/4

b,-x-2/3=6/7

Answer 1

x+1/3 = 3/4

=> x = 3/4 - 1/3

x = 5/12

-x-2/3 = 6/7

=> -x = 6/7 + 2/3

-x   = 32/21

x = -32/21

Answer 2

a) \(x+\frac{1}{3}=\frac{3}{4}\Rightarrow x=\frac{3}{4}-\frac{1}{3}\Rightarrow x=\frac{5}{12}\)

b) \(-x-\frac{2}{3}=\frac{6}{7}\Rightarrow-x=\frac{6}{7}+\frac{2}{3}\Rightarrow-x=\frac{32}{21}\Rightarrow x=-\frac{32}{21}\)