Question

8p+3q =2
2p+6q=14
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Answer 1

8p+3q = 2    *(-2)

2p+6q=14

-13P+(-6Q) = -4

2p+6q=14

AI CORTA -6Q COM +6Q

DEPOIS SOME TUDO

10P = 16

P = 1,6

AGORA SUBSTITUA

8*1,6+3Q = 2

2*1,6+6Q = 14

3Q = -12,8+2

6Q = -1,25+14

Q = -3,6

Q = 2,125

Answer 2

8p + 3q  = 2    * ( -2)

2p + 6q = 14    

- 16p - 6q = - 4

2p + 6q = 14

- 14p = 10 *(-1)

14p = - 10

p = - 10/14

p = - 5/7

2p + 6q = 14

2*(-5/7) + 6q = 14

-10/7 + 6q = 14

-10 + 42q = 98

42q = 98 + 10

42q = 108

q = 108/42

q = 18/7

( -5/7,  18/7 )