Question 60950
6x+9y=6
6x=6-9y
x=6/6-9y/6
x=1-3y/2 substitute (1-3y/2) for z in the other equation
6*(1-3y/2)=6-9y
6-18y/2=6-9y
6-9y=6-9y
0=0 no solutions other than x & y=0