Question

Answer 1

2: 

a: =>x-8/5=1/20-1/10=-1/20

=>x=-1/20+8/5=-1/20+32/20=31/20

b; =>|2x-5|=4

=>2x-5=4 hoặc 2x-5=-4

=>2x=1 hoặc 2x=9

=>x=9/2 hoặc x=1/2

1:

a: \(=-\dfrac{1}{3}-\dfrac{1}{3}+\dfrac{5}{3}-1=1-1=0\)

b: \(=\dfrac{1}{2}\cdot\dfrac{1}{11}-\dfrac{1}{2}:\dfrac{11}{12}=\dfrac{1}{22}-\dfrac{12}{22}=\dfrac{-11}{22}=\dfrac{-1}{2}\)

c: \(=\dfrac{-25}{13}-\dfrac{9}{17}+\dfrac{12}{13}-\dfrac{25}{17}=-2-1=-3\)