Question

2a -c = d-r, solve for a

Answer 1

hope this helps !

Add
c
c
to both sides of the equation.
2
a
=
d
−
r
+
c
2
a
=
d
-
r
+
c
Divide each term in
2
a
=
d
−
r
+
c
2
a
=
d
-
r
+
c
by
2
2
and simplify.