\(x+75\%x=-1\frac{1}{4}\)
=>\(x+\frac{3}{4}x=\frac{-5}{4}\)
=>\(\left(1+\frac{3}{4}\right)x=\frac{-5}{4}\)
=>\(\frac{7}{4}x=\frac{-5}{4}\)
=>\(x=\frac{-5}{4}:\frac{7}{4}\)
=>\(x=\frac{-5}{7}\)
<=> 175%x =\(\frac{-5}{4}\)
<=> x = \(\frac{-5}{4}\) . \(\frac{100}{175}\) =\(\frac{-5}{7}\)