Question

Which expressions would complete this equation so that it has one solution?

4(2x – 3) – 4x =

Choose exactly two answers that are correct.

A.
4x – 12

B.
3x – 4

C.
3(2x – 6)

D.
4(x – 5)

Answer 1

A is always true, D is never true

Answer 2

4(2x – 3) – 4x

distribute the 4
8x-12 -4x

4x-12

which is exactly the same as A (therefore, A is always true, since they are the same)

Answer 3

and 4x-12 = 4x-20 can never be true, because you can never find an x that will fit to make that happen.

the 4x-20 will always be exactly 8 spaces below the other one, those lines are parallel to each other