ta có
11x-(-8x)=190
19x=190
x=10
=>a=-80;b=110
Ta co:
11x-(-8x)=190
19x=190
x=10
=>x=-80;b=110
\(\frac{a}{b}=\frac{-8}{11}\Leftrightarrow1-\frac{a}{b}=1-\frac{-8}{11}\Leftrightarrow\frac{b-a}{b}=\frac{19}{11}\Leftrightarrow\frac{190}{b}=\frac{19}{11}\Rightarrow b=110..\)
Vậy \(\frac{a}{b}=\frac{-8}{11}\Rightarrow a=\frac{-8b}{11}=\frac{-8.110}{11}=-80.\)
ĐÁP SỐ: a = -80 b = 110