Question

Answer 1

 \(-\dfrac{13}{13}\) hay \(-\dfrac{13}{18}\) vậy mình nhìn ko rõ ?

+) \(-\dfrac{13}{13}\)

a) \(x-\dfrac{5}{12}-\dfrac{4}{9}=-\dfrac{13}{13}\)

\(\Rightarrow x-\dfrac{31}{36}=-1\)

\(\Rightarrow x=-1+\dfrac{31}{36}=-\dfrac{67}{36}\)

+) \(-\dfrac{13}{18}\)

a) \(x-\dfrac{5}{12}-\dfrac{4}{9}=-\dfrac{13}{18}\)

\(\Rightarrow x-\dfrac{31}{36}=-\dfrac{26}{36}\)

\(\Rightarrow x=-\dfrac{26}{36}+\dfrac{31}{36}=\dfrac{5}{36}\)

Answer 2

x-5/12-4/9=-13/18

x-5/12=-13/18+4/9

x-5/12=-13/18+8/18

x-5/12=-5/18

x=-5/18+5/12

x=-60/216+90/216

x=5/36