Question

Bài 1 : tìm x

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

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

c) \(\dfrac{x}{14}\) = \(\dfrac{1}{7}\) + \(\dfrac{-3}{14}\)

Answer 1

a)x + 3/5 = 1/5 <=> x = 1/5 - 3/5 <=> x = -2/5

b)-1/2 - x = 1/3 - 1/-4 <=> -x = 1/3 + 1/4 + 1/2 <=> -x = 8/24 + 6/24 + 12/24 <=> -x = 26/24 <=> x = -26/24

c)x/14 = 1/7 + -3/14 <=> x/14 = 2/14 + -3/14<=> x/14 = -1/14 <=> x = -1

có j thiếu sót các bạn sửa và bình luận cho mình nha

Answer 2

a) \(x+\dfrac{3}{5}=\dfrac{1}{5}\Rightarrow x=\dfrac{1}{5}-\dfrac{3}{5}=\dfrac{-2}{5}\)

b) \(\dfrac{-1}{2}-x=\dfrac{1}{3}-\dfrac{1}{-4}\rightarrow\dfrac{-1}{2}-x=\dfrac{7}{12}\)\(\Rightarrow x=\dfrac{-1}{2}-\dfrac{7}{12}=\dfrac{-13}{12}\)

c) \(\dfrac{x}{14}=\dfrac{1}{7}+\dfrac{-3}{14}\rightarrow\dfrac{x}{14}=\dfrac{-1}{14}\Rightarrow x=-1\)

Answer 3

chỗ cau b) minhd quên ko rýt gọn x = -26/24 = -13/12