X × 99 + x = 432 + 568
X × 99 + x × 1 = 1000
X × (99 + 1 )=1000
X × 100 = 10
X =10
\(x\times99+x=432+568.\)
\(\Leftrightarrow x\times99+x=1000\)
\(\Leftrightarrow x\times\left(99+1\right)=1000\)
\(\Leftrightarrow x\times100=1000\)
\(\Leftrightarrow x=10\)
\(x.99+x=432+568\)
\(x.99+x=1000\)
\(x\left(99+1\right)=1000\)
\(100x=1000\)
\(x=10\)
x.99+x=432+568
x.99+x=1000
x.(99+1)=1000
x.100+1000
x=1000:100
x=10