megan3421 megan3421

04-07-2021
Mathematics

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2p -5q=8.. 3p-7q=11 use substitution

Respuesta :

rijarafiquee rijarafiquee

04-07-2021

Answer:

p = -1 q = -2

Step-by-step explanation:

3p - 7q = 11 -7q = -3p + 11 q = 3/7p - 11/7

2p - 5(3/7p - 11/7) = 8

2p - 15/7p + 55/7 = 8

-1/7p + 55/7 = 8

-1/7p = 1/7

p = -1

2(-1) - 5q = 8

-2 - 5q = 8

-5q = 10

q = -2

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