328.ա)x=9-4=5 բ)x=5-5=0 գ)x=8-8=0
դ)x=-4-2=-6   ե)x=10/7  զ)x=1/5
է)x=2:1/3=2*3/1=6/2 ը)x=1/7:3=1/7*3=1/21 թ)x=0
ժ)x=0 ի)x=0 լ)x=0:-1/2=0*2/-1=0

329.ա)x=-6/7:-3/4=-6/7*-4/3=24/21 բ)x=7:-5/37*3/-5=21/-5 գ)x=5:2/10=5*10/2=50/10
  դ)x=18/10:-72/100=18/10*100/-72=1800/-720  ե)x=5/3:7/3=5/3*3/7=15/21 զ)x=35/10:7/3=35/10×3/7=105/70
  է) ը)

330.ա)x=5/3 բ)x=4/7 գ)x=7
  դ)x=5 ե)x=9/5 զ)x=15/7
  է)x=-4 ը)x=-1/2 թ)x=5/2
  ժ)x=2/3 ի) լ)