Question

Decide whether the equation is always, sometimes, or never true.

3 - 4x = 4x - 3

Answer 1

Never true

Answer 2

why?

Answer 3

how do you figure that out?

Answer 4

Take some example (values) of x and try.

Answer 5

but I set both to zero

3-4x=0 or 4x-3=0
-4x=-3 or 4x=3
x=3/4 or x=3/4

what did i do wrong?

Answer 6

Nope I didn't mean that, we have :
3 - 4x = 4x - 3 // replace for example x = 0
3 - 4 (0) = 4 (0) - 3
3 = -3 // false
And so on..