\(\dfrac{x-1}{2}-\dfrac{x+1}{15}-\dfrac{2x-13}{6}=0\)
\(\Rightarrow\dfrac{15\left(x-1\right)-2\left(x+1\right)-5\left(2x-13\right)}{30}=0\)
\(\Rightarrow15\left(x-1\right)-2\left(x+1\right)-5\left(2x-13\right)=0\)
\(\Rightarrow15x-15-2x-2-10x+65=0\)
\(\Rightarrow3x-48=0\)
\(\Rightarrow3x=48\Rightarrow x=16\)
Chúc bạn học tốt!
Bài Làm:
\(\dfrac{x-1}{2}-\dfrac{x+1}{15}-\dfrac{2x-13}{6}=0\)
\(\Leftrightarrow\)\(15\left(x-1\right)-2\left(x+1\right)-5\left(2x-13\right)=0\)
\(\Leftrightarrow15x-15-2x-2-10x+65=0\)
\(\Leftrightarrow15x-2x-10x=15+2-65\)
\(\Leftrightarrow3x=-48\)
\(\Leftrightarrow x=-16\)
Vậy \(x=-16\).
\(S=\left\{-16\right\}\)
Chúc pạn hok tốt!!!
