Question

subtract the sum of 7x + 4y - 5z + 5 and 6x - 7z - 8 from 12x + 3y - z​

Answer 1

Answer:

-x -y +11z +3

Step-by-step explanation:

First lets add

$\left[\begin{array}{ccc}7x&-5z&5+4y\\6x&-7z&-8+0y\\13x&-12z&-3 + 4y\end{array}\right]$

Then subtract

$\left[\begin{array}{ccc}12x&3y&-z+0\\-13x&-4y &+12z+3 \\-x&-y&+11z + 3\end{array}\right]$