x+1/3x=38-104/3x=28x=28*3/4x=211/2x-1/4=1/21/2x=1/2+1/41/2x=3/4x=3/4*2x=3/217/20-70%x=3/200.7x=17/20-3/200.7x=7/10x=7/10*10/7x=1