## anonymous one year ago Solve −np − 80 < 60 for n

1. anonymous

$-np - 80 < 60$

2. anonymous

What do you think we would do first?

3. anonymous

4. anonymous

Yep! Which we then get $-np < 140$

5. anonymous

So now we want to get the 'n' by itself right?

6. anonymous

divide by -n

7. anonymous

Well that is one way but there is a faster/ easier way to doing this. Try thinking of the problem like this: $-1np$ We are able to divide the -1 to remove the negative on the 'np' side.

8. anonymous

9. anonymous

and can u help me with another one

10. anonymous

$np > 140$ Now because we divide by a negative, making us flip the sign. So the answer, if you were looking just for 'n', would be $n > \frac{ 140 }{ p }$

11. anonymous

Sure

12. anonymous

Solve 2a − 5d = 30 for d.

13. anonymous

Hmmm... I remember this type of equation specifically, however, I do not remember the way in which you were to solve it. I will try my best though.

14. anonymous

ok thank u

15. anonymous

But I think the answer would either be d = -6 or d = -3

16. anonymous

i think its -6