Question

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

Answer 1

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