Question

помогите!!!28Х:12=7,Х(83-76)=42

Answer 1

28х /12=7
28х=7*12
28х=84
х=84/28
х=3

Answer 2

28х:12=7
28х=7х12
28х=84
х=84:28
х3
х(83-76)=42
х7=42
х=42:7
х=6