Question

Solve −np − 80 < 60 for n

Answer 1

\[-np - 80 < 60\]

Answer 2

What do you think we would do first?

Answer 3

add 80 to both sides

Answer 4

Yep! Which we then get \[-np < 140\]

Answer 5

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

Answer 6

divide by -n

Answer 7

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.

Answer 8

so what is the answer

Answer 9

and can u help me with another one

Answer 10

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

Answer 11

Sure

Answer 12

Solve 2a − 5d = 30 for d.

Answer 13

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.

Answer 14

ok thank u

Answer 15

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

Answer 16

i think its -6