№517.
1) -1.22×х = 6.1
х = 6.1:(-1.22)
х = -5
2) -8.9×(-х) = 11.57
-х = 11.57:(-8.9)
-х = -1.3
х = 1.3
3) 9.6×(-у) = -43.2
-у = -43.2:9.6
-у = -4.5
у = 4.5
4) -5.3×х = 2.65
х = 2.65:(-5.3)
х = -0.5
5) 0.3×(-х) = -2.34
-х = -2.34:0.3
-х = -7.8
х = 7.8
6) -6.1×у = 19.52
у = 19.52:(-6.1)
у = -3.2