Question

640:{x.9+8}=8 решение

Answer 1

640:(х•9+8)=8
х•9+8=640:8
х•9+8=80
х•9=80-8
х•9=72
х=72:9
х=8
640:(х•9+8)=8
8=8

Answer 2

,x*9+8=640:8
x*9+8=80
x*9=72
x=72:9
x=8
640:(x*9+8)=8
x=8