Question

subtract 3 x - 4y - qz from the
Sum of 5x- 4y +7z and 4x + 9y- 12z

or

Subtract 21+3m-4n from the
Sum of 91 +3m-4n-51+ 2m +5n



answer plss​

Answer 1

Answer:

6x + y + (-5-q)z

Step-by-step explanation:

5x -4y +7z +(4x +9y -12z)

5x -4y +7z +4x +9y -12z

(5x+4x) +(9y-4y)+( -12z+7z)

9x +5y -5z

9x +5y -5z -( 3 x - 4y - qz)

9x +5y -5z -3 x +4y +qz

(9x-3x) + (5y-4y)+( -5z - qz)

6x + y + (-5-q)z

hope it will help you