\(\left(x-21.13\right):11=30\)
\(\left(x-273\right)=30.11\)
\(x-273=330\)
\(x=330+273\)
\(x=603\)
vậy \(x=603\)
\(\left(627-138\right):\left(x:2\right)=163\)
\(489:\frac{x}{2}=163\)
\(\frac{x}{2}=489:163\)
\(\frac{x}{2}=3\)
\(\Rightarrow x=6\)
vậy \(x=6\)
học tốt Trần Bích Ngọc
\(\left(x-21\times13\right)\div11=30\)
\(\left(x-273\right)\div11=30\)
\(x-273=30\times11\)
\(x-273=330\)
\(x=330+273\)
\(x=603\)
\(\left(627-138\right)\div\left(x\div2\right)=163\)
\(489\div\left(x\div2\right)=163\)
\(x\div2=489\div163\)
\(x\div2=3\)
\(x=3\times2\)
\(x=6\)
