Question

a.. \(\frac{7-8x}{6}=\frac{-4+2x}{5}\)
\(b.\frac{1-3:x}{8}=\frac{8}{1-3:x}\)          
c. \(\left(x+1\right).\left(x-2\right)\ge0\)
h. \(\left(x+1\right).\left(x-3\right)\le0\)
AI làm nahnh mih tích cho nha đang rất rất cần

Answer 1

\(\frac{7-8x}{6}=\frac{-4+2x}{5}\)

\(\Leftrightarrow5\left(7-8x\right)=6\left(-4+2x\right)\)

\(\Leftrightarrow35-40x=-24+12x\)

\(\Leftrightarrow35+24=40x+12x\)

\(\Leftrightarrow59=52x\)

\(\Rightarrow x=\frac{59}{52}\)

Answer 2

\(\frac{1-3:x}{8}=\frac{8}{1-3:x}\)

\(\Leftrightarrow1-3:x=8\)

\(\Leftrightarrow-3:x=7\)

\(\Leftrightarrow x=-\frac{7}{3}\)