(x+8)=12? x:9-8=12 72:(x-6)=12? 72:x-6=12?

Question

(x+8)=12? x:9-8=12 72:(x-6)=12? 72:x-6=12?

Answer 1

1.(x+8)=12
x+8=12
x=12-8
x=4
2. x:9-8=12
x:9=12+8
x:9=20
x=20*9
x=180
3. 72:(x-6)=12
(x-6)=72:12
x-6=6
x=6+6
x=12

Answer 2

Х=12-8           х:9=12+8             х-6=72:12
х=4               х:9=20                  х-6=6
                     х=20*9                 х=6+6
                     х=180                  х=12