Question

3p+2q=11
4q-r=6
6p+7r=4

Answer 1

- > 3p=11- 2q
    * p=(11-2q)/3
- > 4q=6-r
    * q=(6-r)/4
-> 6p=4 - 7r
   *p = (4-7r)/6
Remplazando:
p=(11-2q)/3
(4-7r)/6=(11-2(6-r)/4)/3
4-7r=2(11-(12+2r/4))
4-7r=22-24+4r/8
8(4-7r)=2+4r
32-56r=2+4r
30=60r
30/60=r
0.5= r

*Remplazando para hallar "q"
4q-(0.5)=6
4q=6.5
q=6.5/4
q=1.625

*Remplazando para hallar "p"
3p+2(1.625) =11
3p=7.75
p=2.583