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17-02-2021
Mathematics

contestada

2x +5y = -7
7x + y = -8
Solve by substitution SHOW WORK!

Respuesta :

17-02-2021

Answer:

x = 1, y = -15

Step-by-step explanation:

7x + y = -8 ⇒ y = -7x-8

2x + 5y = -7

substitute -7x-8 for y:

2x + 5(-7x-8) = -7

2x - 35x - 40 = -7

-33x - 40 = -7

-33x = -33

x = 1

y = -7x-8 = -15

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