Question

Solve: -3 < 2x + 1 < 5. It's supposed to = 0. Thanks.

Answer 1

start by subtracting 1 from each part of the inequality... what do you get..?

Answer 2

I got negative 2 on one side and +2 on the other

Answer 3

well that is solving for x, which is what you need to do

-2 < x < 2

so any value of x between -2 and 2 makes the original inequality true.

you can test by letting x = 0... that is between -2 and 2

so substitute it into the original inequality

is

-3 < 2*0 + 1 < 3 ? or is -3 < 1 < 3

if so you ahve the correct solution.

Answer 4

Thanks!