Question

8,4-(x-7,2)=8,6
-1,3+(x-4,8)=-7,1
-13,6.(-7,2+313,2:8,7)

Answer 1

8,4-(x-7,2)=8,6
х-7.2=8.4-8.6
х-7.2=-0.2
х=-0.2+7.2
х=7

-1,3+(x-4,8)=-7,1
х-4.8=-7.1+1.3
х-4.8=-5.8
х=-5.8+4.8
х=-1

-13,6+(-7,2+313,2:8,7)=15.2
1)313.2:8.7=36
2)-7.2+36=28.8
3)-13.6+28.8=15.2