2
A) a = b + c
c=a-b
b) a = c - b
c=a+b
c) a = b - c
c=b-a
d) a = bc
c=a/b
e) a = c/b
c=ab
f) a = b/c
c=b/a
3
A=bc-d
a+d=bc /:b
c=a+d/b
a=bc+d
a-d=bc /:b
c=a-d/b
a=c(b-d) /:b-d
c= a / b-d
a=b+c /d /*d
ad=b+c
ad-b=c
a=b-c/d /*d
ad=b-c
c=ad-b
a=b/c+d /*(c+d)
ac+ad=b
ac=b-ad /:a
c=b-ad/a
a=b/c-d /*(c-d)
ac-ad=b
ac=b+ad /:a
c=b-ad/a
a=b-c/d /*d
ad=b-c
ad-b=-c /*(-1)
c=-ad+b
a=b/c+d /*(c+d)
ac+ad=b
ac=b-ad /:a
c=b-ad/a
