6 7 3 2 х 0 5. 5:(1-Х)=4:(6-Х). 6х+3/5х-5>9/5. 3х-9<0 5х+2>0. (8х + 7) *5. -2(1/4+Х)-6(1/16-2х)=3х. 3х-2х-1/5 3х-19/5. 0,4(X-3)-1,6=5(0,1x-0,5). (5х-19х/х+1)/15х-15/4х+4. 3х+1/4-7х-х2/10 х2-1/8. 5а+2/а3-3а+2/а3. 2/3+2/7. 1-4(1/2у+1)+5(0,2-у). X3 и x5