4 2/5(3/11-а)-1 1/5= пж
22/5(3/11-a)-11/5=0 6/5-22/5a-11/5=0 -22/5a=11/5-6/5 -22/5a=5/5 -22/5a=1 a=1/-22/5 a=1*(-5/22) a=-5/22