\(x\times199-x\times75=12648\)
\(\Leftrightarrow x\times\left(199-75\right)=12648\)
\(\Leftrightarrow x\times124=12648\)
\(\Leftrightarrow x=12648:124\)
\(\Leftrightarrow x=102\)
x*199-x*75=12648
=>x*(199-75)=12648
=>x*124=126488
=>x=12648/124
=>x=102
\(x\times199-x\times75=12648\)
\(x\times\left(199-75\right)=12648\)
\(x\times124=12648\)
\(x=12648:124\)
\(x=102\)