sam7999 sam7999

18-02-2020
Mathematics

contestada

What is the solution of 3x + y = 9 and 3x - 5y = 15

Respuesta :

amna04352 amna04352

18-02-2020

Answer:

x = 10/3, y = -1

Step-by-step explanation:

3x+y = 9 (1)

3x-5y = 15 (2)

(1) - (2) [subtract (2) from (1)]

6y = -6

y = -1

Using (1),

3x + (-1) = 9

3x = 10

x = 10/3

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