\(a,\dfrac{x}{6}=\dfrac{-1}{2}\\ x=\dfrac{6\cdot-1}{2}\\ \Rightarrow x=-3\)

\(b,\dfrac{x}{10}=\dfrac{3}{15}\\ x=\dfrac{10\cdot3}{15}\\ \Rightarrow x=2\)

\(c,\dfrac{2x}{49}=\dfrac{-2}{7}\\ 2x=\dfrac{49\cdot-2}{7}\\ 2x=-14\\ x=-14:2\\ \Rightarrow x=-7\)

\(d,\dfrac{3x}{32}=\dfrac{-3}{8}=\\ 3x=\dfrac{32\cdot-3}{8}\\ 3x=-12\\ x=12:\left(-3\right)\\ \Rightarrow x=-4\)

\(e,\dfrac{x+5}{9}=\dfrac{14}{18}\\ x+5=\dfrac{9\cdot14}{18}\\ x+5=7\\ x=7-5\\ \Rightarrow x=2\)

\(f,\dfrac{2x-1}{15}=\dfrac{3}{5}\\ 2x-1=\dfrac{15\cdot3}{5}\\ 2x-1=9\\ 2x=9+1\\ 2x=10\\ x=10:2\\ \Rightarrow x=5\)

\(2\cdot y+y\cdot8=2010\)

\(y\cdot\left(2+8\right)=2010\\ y\cdot10=2010\\ y=2010:10\\ \Rightarrow y=201\)

Ôi tr :v