Помогите 8,4-(x-4,8)=-7.1

Question

Помогите 8,4-(x-4,8)=-7.1

Answer 1

8.4-х+4.8=-7.1
-х=-7.1-8.4-4.8
-х=-20.3
х=20.3

Answer 2

8,4-x+4,8=-7,1
8,4+4,8+7,1=x
x=20,3