`3/5 xx x +2+40=53`
`=> 3/5 xx x +2=53-40`
`=> 3/5 xx x +2=13`
`=> 3/5 xx x =13-2`
`=> 3/5 xx x=11`
`=> x=11:3/5`
`=>x= 11 xx 5/3`
`=> x= 55/3`
\(\dfrac{3}{5}\times x+2+40=53\\ \rightarrow\dfrac{3}{5}\times x+2=53-40\\ \rightarrow\dfrac{3}{5}\times x+2=13\\ \rightarrow\dfrac{3}{5}\times x=13-2\\ \rightarrow\dfrac{3}{5}\times x=11\\ \rightarrow x=11:\dfrac{3}{5}\\ \rightarrow x=11\times\dfrac{5}{3}\\ \rightarrow x=\dfrac{55}{3}\)