\(x\times199-x\times75=12648\)
\(x\times\left(199-75\right)=12648\)
\(x\times124=12648\)
\(x=12648\div124\)
\(x=102\)
X x 199 - X x 75 = 12648
X x (199 - 75) = 12648
X x 124 = 12648
X = 12648 : 124
X = 102
X x 199 - X x 75 = 12648
X x ( 199 - 75 ) = 12648
X x 124 = 12648
X = 12648 : 124
X = 102