Question

someone please solve -2-10/3 my answer is not the same as the books?

Answer 1

i think the answer is -12/3 = -4

Answer 2

if this is (-2) - 10/3 , then the first thing you want to do is get everything with the same denominator

Answer 3

so -2 *3/3 = 6/3

Answer 4

so the problem is really -6/3 - 10/3

Answer 5

or -16/3

Answer 6

does that make sense?

Answer 7

yes thats what i got then you have to divide by 4. so then multiply by the reciprocal and i got -16/12 which simplifies to -4/3 right?

Answer 8

hmmm, what do you mean divide by 4?

Answer 9

well that was part of the equation. its x + 4z=-2 and x= 10/3

Answer 10

oh I did not see that part. so you're solving for z

Answer 11

yeah i didnt include it in my question but yeah solving for z

Answer 12

so right 4z = -16/3

Answer 13

so to isolate z, you divide both sides by 4

Answer 14

so z = -16/(3*4) = -16/12 = -4/3

Answer 15

also, go ahead and plug it back in to the equation

Answer 16

thats exactly what i had but the book said 1/3

Answer 17

since now you have both the x value, and the z value

Answer 18

put them back in and make sure the equation holds true

Answer 19

(even if you just use your calculator)

Answer 20

the book said -1/3

Answer 21

yeah ill try it

Answer 22

if you put them back in, then 10/3 + 4*(-4/3) = - 2

Answer 23

so 10/3 - 16/3 = -2

Answer 24

-6/3 = -2

Answer 25

-2 = -2

Answer 26

so you were right, back of the book was wrong :p

Answer 27

lol okay good cause that was really irritating me i was sitting there thinking "how am i wrong?!" ahah

Answer 28

haha yeah =) it's good you questioned it :)

Answer 29

thank you