Question

1. Add the following:
a. p-q + 7r; 2q - 4r +5, p -7r - 8​

Answer 1

Answer:

p-q+7r;2q - 4r + 5, p- 7r - 8

= p+p -q+2q +7r-4r-7r +5-8

= 2p +1q +7r-11r -3

= 2p +q -4r -3

Answer 2

Answer:

(p-q+7r)+(2q-4r+5)+(p-7r-8)

p-q+7r+2q-4r+5+p-7r-8

p+p-q+2q+7r-4r-7r+5-8

2p+q+7r-11r-3

so,2p+q-4r-3 is the solution