1
Solve   x - = x +
x =
2
2
Solve   x - = x +
x =
2
3
Solve   x - = x +
x =
2
4
Solve
( + ) - ( + ) =
=
2
5
Solve
( + ) - ( + ) =
=
2
6
Solve
( + ) - ( + ) =
=
2
7
Solve     / + =
=
2
8
Solve     / + =
=
2
9
Solve     / + =
=
2