Question

Can someone help me with this please

Answer 1

`-2x-11z`

Explanation:

You have to remember that,

`(-)*(-) = (+)\\(+)*(+)=(+)\\(-)*(+) = (-)`

lets solve now

`-(7x+4z)-3x+(8x-7z)\\-7x-4z-3x+8x-7z\\-7x-3x+8x-4z-7z\\-10x+8x-11z\\-2x-11z`

hope this helps you

please let me know if you have any other questions :-)