253.a
multiply 2 and 4 (2×4=8)
×+3=8
or,× =8_3
or,× =5
you can do others like this
253.h
multiply -1×2= -2
-3x-4= -2
or,-3x= -2+4
or,-3x=2(+sign is greater)
or, x=2/-3
