Решите уравнение : 8.4-(х-7.2)=8.6 , -1,3+(х-4.8)=-7.1

Question

Решите уравнение : 8.4-(х-7.2)=8.6 , -1,3+(х-4.8)=-7.1

Answer 1

8.4-(x-7.2)=8.6
8.4-x+7.2=8.6
8.4+7.2-8.6=x
x=7


-1,3+(х-4.8)=-7.1
-1.3+x+4.8=7.1
-1.3+4.8-7.1=-x
-3,6=-x
x=3.6

Answer 2

8.4-(x-7.2)=8.6
8.4-x+7.2=8.6
x= 8.4+7.2-8.6
x=7



-1,3+(х-4.8)=-7.1
-1.3+x+4.8=7.1
-x=-1.3+4.8-7.1
-x=-3.6  / *(-1)
x=3.6