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

so -2 *3/3 = 6/3

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

or -16/3

does that make sense?

hmmm, what do you mean divide by 4?

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

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

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

so right 4z = -16/3

so to isolate z, you divide both sides by 4

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

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

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

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

put them back in and make sure the equation holds true

(even if you just use your calculator)

the book said -1/3

yeah ill try it

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

so 10/3 - 16/3 = -2

-6/3 = -2

-2 = -2

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

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

thank you