Question 549862
2x-3y=9



2x-3(x-4)=9



2x-3(x-4)=9



2x-3x+12=9



-x+12=9



-x=9-12



-x=-3



x=(-3)/(-1)



x=3


-------------------------------------------------------


y=x-4



y=3-4



y=-1



So the solutions are x = 3 and y = -1