Question

Choose the TWO equations that have infinitely many solutions.

3
x
+
x
=
4
x



3
(
x
+
1
)
=
3
x
+
2


2
(
x
+
2
)
=
x
+
4


2
(
x
+
1
)
=
2
x
+
1


3
(
x
+
1
)
=
3
x
+
3

Answer 1

The equations with infinitely many solutions are:

- 3x + x = 4x (becomes 4x = 4x, true for all x)
- 3(x + 1) = 3x + 3 (becomes 3x + 3 = 3x + 3, true for all x)