Ta có : \(\frac{x-2}{18}=\frac{2}{3}\)nên :
\(\left(x-2\right).3=18.2=36\)
\(\Rightarrow x-2=12\)
\(x=14\)
Vậy \(x=14\).
\(\frac{x+3}{-15}=\frac{1}{3}\)nên :
\(\left(x+3\right).3=-15.1=-15\)
\(\Rightarrow x+3=-5\)
\(x=-8\)
Vậy \(x=-8\).
1) \(\frac{x-2}{18}=\frac{2}{3}\)
\(\Leftrightarrow3\left(x-2\right)=2\cdot18\)
\(\Leftrightarrow3x-6=36\)
\(\Leftrightarrow3x=42\)
<=> x=14
2)\(\frac{x+3}{-15}=\frac{1}{3}\)
\(\Leftrightarrow3\left(x+3\right)=-15\cdot1\)
<=> 3x+9=-15
<=> 3x=-24
<=> x=-8
