Question

P = 7a + 6b + 5c

Q = 3a + b - 9c

R = -3c + 4b + 6a

Find i. P +Q+R

ii . P +Q - R​

Answer 1

Answer:

hope it helps

Step-by-step explanation:

i. P+Q+R=7a+6b+5c+3a+b-9c-3c+4b+6a

= 16a + 11b - 7c

ii. P+ Q - R = 13a +3b - 10c