Question

9x-9y=27
7y-3x=-11
solve using elimination method method

Answer 1

x=5/2
y=-1/2

Answer 2

Here is how you solve the problem:

Multiply the first equation by 3 and the second equation by 9 and you get:

27x-27y=81
-27x+63y=-99

Add both of the above equations and you get:

36y=-18
y=-18/36=-1/2

Substitute y=-1/2 into one of the equations and you get:

-3x +7(-1/2)=-11
-3x-7/2=-11
-3x=-15/2
x=5/2