Question

3) 8p + 7q= 43
2p-7=-q
I need to solve using substitution. thanks.​

Answer 1

p=1, q=5. (1, 5).

Explanation:

8p+7q=43

2p-7=-q

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q=-2p+7=7-2p

8p+7(7-2p)=43

8p+49-14p=43

8p-14p=43-49

-6p=-6

6p=6

p=6/6=1

2(1)-7=-q

2-7=-5=-q

q=5