Question

7.
Simplity
(0) (x + y - z) + (3x - 5y + 7z) - (14x + 7y - 6z)
(ii) p + p + 2 + p +3 - p - 4-p-5+ p + 10
(iii) n + (m + 1) + (n + 2) + (m + 3) + (n + 4) + (m + 5)​

Answer 1

Step-by-step explanation:

(x+y-z)+(3x-5y+7z)-(14x+7y-6z)

=X+y+z

3x-5y+7z

14x+7y-6z

17x+2y-z

Answer 2

Answer:

(0) -10x -11y + 12z

(ii) 2p + 6

(iii) 3n + 3m + 15

Step-by-step explanation:

(0) (x + y - z) + (3x - 5y + 7z) - (14x + 7y - 6z)

= x + y - z + 3x - 5y + 7z - 14x + 7y - 6z

= (x + 3x - 14x) + (y - 5y - 7y) + (-z + 7z + 6z)

= -10x - 11y + 12z

(ii) p + p + 2 + p + 3 - p - 4 - p - 5 + p + 10

= (p + p + p - p - p + p) + (2 + 3 - 4 - 5 + 10)

= 2p + 6

(iii) n + (m + 1) + (n + 2) + (m + 3) + (n + 4) + (m + 5)

= n + m + 1 + n + 2 + m + 3 + n + 4 + m + 5

= (n + n + n) + ( m + m + m) + (1 + 2 + 3 + 4 + 5)

= 3n + 3m + 15