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08-03-2019
Mathematics

contestada

Solve using substitution
7x-9y=-9
X=-9

Respuesta :

mahomie4life749 mahomie4life749

08-03-2019

Answer:

y=6

x=6.42

Step-by-step explanation:

7(-9)+9y=-9

-63+9y=-9

+63 +63

9y/9=54/9

y=6

7x-9(6)=-9

7x-54=-9

+54 +54

7x/7=45/7

x=6.42

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