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13-12-2019
Mathematics

contestada

3x-30=y
7y-6=3x
using elimination

Respuesta :

Yang100 Yang100

13-12-2019

Answer:

x=12, y=6. (12, 6).

Step-by-step explanation:

3x-30=y

7y-6=3x

----------------

7y-6-30=y

7y-36=y

7y-y-36=0

6y-36=0

6y=0+36

6y=36

y=36/6

y=6

7(6)-6=3x

42-6=3x

36=3x

x=36/3

x=12

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