Question

bài 45: Tìm x, biết:

a) x=\(\dfrac{-1}{2}+\dfrac{3}{4}\);                    b) \(\dfrac{x}{5}=\dfrac{5}{6}+\dfrac{-19}{30}\)

Answer 1

a, x= \(\dfrac{1}{4}\)

b, x= \(\dfrac{1}{5}\)

Answer 2

x=-2/4+3/4                             x=1/4

6x/30=25/30+-19/30                       6x/30=6/30            6x=6          x=1

Answer 3

lớp mấy đấy bạn

chi pa pi mô nha nhô

Answer 4

a) Ta có: \(x=\dfrac{-1}{2}+\dfrac{3}{4}\)

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

hay \(x=\dfrac{1}{4}\)

Vậy: \(x=\dfrac{1}{4}\)