Question

-3(2n+2)=9 solve for n.

Answer 1

divide both sides by -3
subtract 2 from both sides
divide both sides by 2

Answer 2

got -2.5?

Answer 3

yup!

Answer 4

I have to write my answer as a simplified fraction or integer

Answer 5

simplified fraction, then -5/2.
mixed number -2, 1/2

you can't write this as an integer though, cuz it is not a whole number.

Answer 6

Can you help with another question?

Answer 7

Sure.

Answer 8

4(5z-1)-2(2+7)=5(z+1) z = ?

Answer 9

4(5z-1)-2(2+7)=5(z+1)
expand each
4(5z-1)=?
2(2+7)=?
5(z+1)=?

Answer 10

each variable equals one?
so its
4(5(1)-1)
2(2+7)
5(1+1)
??

Answer 11

don't substitute for z, just expand each of those like I asked.

Answer 12

20z - 4 ?
18 ?
10 ?

Answer 13

5(z+1) is 5z-5
so
20z - 4 +18=5z-5

add like terms.

Answer 14

My bad
20z - 4 +18=5z+5

Answer 15

15z+14=5
15z=5-14
15z=-9
z=-3/5