Question

tìm x,y biết:

a)\(\left|x+\dfrac{4}{15}\right|-\left|3,75\right|=-\left|-2,15\right|\)

b) \(\left|\dfrac{1}{2}-\dfrac{1}{3}+x\right|=-\dfrac{1}{4}-\left(y\right)\)

c)\(\left|x-y\right|+\left|y+\dfrac{9}{25}\right|=0\)

d)\(\left|x-\dfrac{3}{5}\right|< \dfrac{1}{3}\)

e)\(\left|x+\dfrac{11}{2}\right|>\left|-5,5\right|\)

Answer 1

a: \(\Leftrightarrow\left|x+\dfrac{4}{15}\right|=-2.15+3.75=1.6=\dfrac{8}{5}\)

=>x+4/15=8/5 hoặc x+4/15=-8/5

=>x=4/3 hoặc x=-28/15

c: =>x-y=0 và y+9/25=0

=>x=y=-9/25

d: =>-1/3<x-3/5<1/3

=>4/15<x<14/15

e: =>|x+5,5|>5,5

=>x+5,5>5,5 hoặc x+5,5<-5,5

=>x>0 hoặc x<-11