Question

Choose the missing step in the given solution to the inequality -x - 3 < 13 + 3x.


-x - 3 < 13 + 3x



-4x < 16

x > -4



a) -4x - 3 > 13

b) 2x - 3 < 18

c) -4x - 3 < 13

d) 2x - 3 > 18

Answer 1

Arguably there are two things done between these steps, however, looking at the left hand side, what would you need to do to go from step 1 to step 3?

Answer 2

add three?

Answer 3

Yes, however that would be what transitioned you out of step 2 heading to step 3. What they are looking for would be the equation just before you added your 3.

Answer 4

The way this is set up they are doing two movements at a time. You got one of them, to add the three, what else do they do?