Question

If p+q = 4, q+r = -2, r+p = 3, then p+q+r =? ​

Answer 1

Step-by-step explanation:

let

p+q=4. ---(1)

q+r= -2 ---(2)

r+p= 3 ---(3)

adding eq. (1),(2) &(3)

(p+q)+(q+r)+(r+p)=4+(-2)+3

2p+2q+2r=5

taking 2 common :

2(p +q + r)= 5

p+q+r = 5/2

Answer

5/2

Answer 2

Answer:

p+q+r=2.5

Step-by-step explanation:

p=4-q

q=-2-r

r=3-p

so, p=4-(-2-(3-p))

     p=4+2+3-p

     p=9-p

     p+p=9

     2p=9

     p=9/2=4.5

q=-2-(3-4.5)

q=-2-3+4.5

q=-5+4.5

q=-0.5

and

r=3-4.5

r=-1.5

so,p+q+r = 4.5+(-0.5)+(-1.5)

               =4.5-0.5-1.5

               =4.5-2

               =2.5