Question

Subtract 9 xy -7y + 8 x -3z from the sum of 5 xy -9 x +3y -6z and 6 xy -2 x + 8y +3z.

Answer 1

Answer:

11xy+11y-3z-9

Step-by-step explanation:

(5xy-9+3y-6z)+(6xy-2x+8y+3z)

5xy+6xy=11xy

3y+8y=11y

-6z+3z=-3z

11xy+11xy-3z-9

Answer 2

Answer:

5xy - 9x + 3y - 6z + (6xy - 2x + 8y + 3z)

(5xy + 6xy) + (-9x -2x) + (3y + 8y) + (-6z + 3z)

11xy + (-11x ) + 11y (- 3z)

11xy - 11x + 11y - 3z

11xy - 11x + 11y - 3z - (9xy - 7y + 8x - 3z)

11xy - 11x + 11y - 3z - 9xy + 7y - 8x + 3z

(11xy - 9xy) + (- 11x - 8x) + (11y + 7y) + (3z - 3z)

2xy + (- 19x) + 18y

2xy - 19x + 18y