Question 662063
3x-6y=9

add -3x to both sides

-3x+3x-6y=9-3x

-6y= 9-3x
/-6

y= 9/-6 -3x/-6

y= -3/2 +(1/2)x

y= (1/2)x -3/2


2x + 3y - 4 = x + 5  

add -2x to both sides
-2x+2x+3y-4 = x+5 -2x
3y-4= -x+5
add +4 to both sides
3y+4-4=-x+5+4
3y=-x+9
/3
y= -x/3 + 3