Question

   (X-1,75) :0,01

_______________  = 41,25

   (1-0,75) x 80

Answer 1

\(\frac{\left(X-1,75\right):0,01}{\left(1-0,75\right)x80}=41,25\)

\(\frac{\left(X-1,75\right)x100}{1x80-0,75x80}=41,25\)

\(\frac{\left(X-1,75\right)x100}{80-60}=41,25\)

\(\frac{\left(X-1,75\right)x100}{20}=41,25\)

\(\left(X-1,75\right)x100=41,25x20\)

\(\left(X-1,75\right)x100=825\)

          \(\left(X-1,75\right)=825:100\)

          \(\left(X-1,75\right)=8,25\)

                               \(X=8,25+1,75\)

                               \(X=10\)

    Tham khảo nha !!!