The Purplemath Forums

by **StacieWilliams** on Thu Aug 12, 2010 2:12 am

I'm having trouble with these two problems

inequalities using both principles, here are the problems can you please help to gain understanding

1. - 3z - 7 > - 4z + 1

2.- 8r + 8 <or equal to - 2r(3r - 9)

Sorry about that don't know how to put the correct sign in there so I spelled it out.

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by **Martingale** on Thu Aug 12, 2010 2:30 am

StacieWilliams wrote:I'm having trouble with these two problems

inequalities using both principles, here are the problems can you please help to gain understanding

1. - 3z - 7 > - 4z + 1

2.- 8r + 8 <or equal to - 2r(3r - 9)

Sorry about that don't know how to put the correct sign in there so I spelled it out.

$- 3z - 7 > - 4z + 1$

$- 8r + 8 \leq - 2r(3r - 9)$

where are you stuck?

by **stapel_eliz** on Thu Aug 12, 2010 11:00 am

StacieWilliams wrote:inequalities using both principles

What are "both principles"?

StacieWilliams wrote:can you please help to gain understanding

Certainly! Try this lesson on solving linear inequalities. :wink:

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inequalities using both principles: - 3z - 7 > - 4z + 1

inequalities using both principles: - 3z - 7 > - 4z + 1

Re: inequalities using both principles: - 3z - 7 > - 4z + 1