Hello everyone, I am stuck on my Mathematica homework. I am struggling to figure out how to add absolute value.
My problems are to solve inequality's using the reduce command. The next step I am supposed to solve the equation, using a "pretend equal" step, which I know how to do, but with absolute value I am unsure of.
For example, lets say a problem looks like
|3x-7| (less than or equal to) 21.
Am I supposed to break the equation up and do
Reduce[3x-7(less than or equal to) 21].
Reduce[3x-7(greater than or equal to) -21] ?
I looked into doing:
Reduce[Abs[3x-7](less than or equal to)21].
However, that gave a weird result.
If anyone could help me out I would appreciate it, the frustration is really starting to mount!