pypershaw pypershaw

23-10-2020
Mathematics

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- 2x + 3y = 14
x + 2y = 7

Respuesta :

unicorn3125 unicorn3125

23-10-2020

Answer:

x = -1 , y = 4

Step-by-step explanation:

x + 2y = 7 ⇒ x = 7 - 2y

- 2x + 3y = 14

- 2(7 - 2y) + 3y = 14

-14 + 4y + 3y = 14

-14 +7y +14 = 14 +14

7y = 28

y = 4

x = 7 - 2y = 7-2(4) = 7 - 8 = -1

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