Question

X=9y-4x+9y=2what is the solution

Answer 1

System 2x2 , find solution

Reorganize and write x,y terms at left. Numerics values at right

Then

x - 9y= -4

x + 9y= 2

Now, in this special case you can add both equations to eliminate 9y ( this is called method of elimination)

x - 9y + x + 9y = -4 + 2

x + x = -4 + 2

2x = -2

x= -1