Question

add the following 7xyz+8z,9z -15xyz and -8xyz -z​

Answer 1

Answer:

-16xyz + 16z

Step-by-step explanation:

7xyz + 8z +9z - 15 xyz -8xyz - z

=> we should add the numbers according to their coefficients ( xyz ,z)

so first we can take the numbers which has coefficient as xyz:

7xyz -15xyz -8xyz = -16xyz

next we can take the numbers which has the coefficient as z:

8z + 9z - z = 16z

so the answer is  -16xyz + 16z