Ответ:
Пошаговое объяснение:
1) -9.4+6.8 = -2.6
2)14.3+(-8.7) = 14.3-8.7 = 5.6
3) -2.8+(-7.6) = -2.8-7.6 = -10.4
4) 4.7+(-4.7) = 4.7-4.7 = 0
5) 3.8-4.4 = -0.6
6) -16.7-5.5 = -22.2
7) -2.2-(-15.1) = -2.2+15.1 = 12.9
1) 9+x=5
x=5-9
x=-4
2) -33-y = -19
-y = -19+33
-y = 14
y = -14