Question

3) 8p + 7q = 43
2 -7=-q
how can I solve this with substitution?​

Answer 1

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

Explanation:

8p+7q=43

2-7=-q

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-q=-5

q=5

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8p+7(5)=43

8p+35=43

8p=43-35

8p=8

p=8/8=1