Tìm x , y biết
h) y + 30% y = -1,3
i) \(\left(\dfrac{31}{7}+1\right):\left(-4\right)=\left(\dfrac{-1}{28}\right)\)
j) x : \(\dfrac{4}{28}=\dfrac{13}{-19}+\dfrac{8}{25}\)
k) \(\dfrac{3}{4}-x=\dfrac{5}{9}+\dfrac{6}{11}\)
help me !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
\(y+30\%y=-1,3\\ 130\%y=-1,3\\ \Rightarrow y=\dfrac{-1,3}{130\%}=-1\)
\(x:\dfrac{4}{28}=\dfrac{13}{-19}+\dfrac{8}{25}\\ 7x=-\dfrac{173}{475}\\ x=-\dfrac{\dfrac{173}{475}}{7}=-\dfrac{173}{3325}\)