(1/6:(1/4x-1/3))-3/8=1/40 c решением

1) (1/6:(1/4х-1/3))-3/8=1/40 1/6:(1/4х-1/3)=1/40+3/8 1/6:(1/4х-1/3)=1/40+15/40 1/6:(1/4х-1/3)=16/40 1/6=2/5*(1/4х-1/3) 1/6=2/20х-2/15 1/6+2/15=1/10х 5/30+4/30=1/10х 9/30=1/10х 3/10=1/10х х=3/10:1/10 х=3/10*10/1 х=3/1*1/1 х=3.