-3*5=-15 -45*2=90
7*(-9)=-63. 3*(-69)=-207
-2*15=-30. 73*(-4)=-292
4*(-8)=-32. -66*2=-132
-11*11=-121. 80*(-7)=-560
-18:9=-2. -20:2=-10
45:(-9)=-5. 88:(-4)=-22
-148:4=-37. 100:(-50)=2
-75:3=-25 234:(-7)=-32
-93:3=-31. -9:(27*(-1))=1/3
2*(0,6х+1,85)-0,7=1,3х
1,2х+3,7-0,7=1,3х
1,2х-1,3х=0,7-3,7
-0,1х=-3
х=-3:(-0,1)
х=30