a) Ab = 2d |:b
A = 2d/b
b) (A/m) + n = 2 |-n
A/m = 2 - n |*m
A = (2 - n)*m
c)
Ab=2d |:b , dla b≠0
A=2d/b
d)
A/m+n=2 |·m
A+mn=2m
A=2m-mn
A=m(2-n)
