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23-03-2021
Mathematics

contestada

If
x + 2y = 1
X– 2y = 13
then y =

Respuesta :

thebecks thebecks

23-03-2021

Answer:

y = -3

Step-by-step explanation:

x + 2y = 1 then x = 1 - 2y

x– 2y = 13

substitute for x:

1 - 2y - 2y = 13

simplify:

-4y = 12

y = -3

x = 7

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