Question

2x+3y=3
x-12y=-9

solve for x and y

Answer 1

it's wrong

Answer 2

x=1/3,y=7/9

Answer 3

the answer should be x=1/3,y=7/9

Answer 4

the mistake was leaving a -9 instead of a 3 in the substitution of the first equation...

Answer 5

2x+3y=3 x-12y=-9
make x the subject in the 2nd eqn
x=12y-9
put it into the first eqn
2(12y-9)+3y=-9
24y-18+3y=-9
27y-18=-9
27y=-27
y=-1
put y=-1
into 2x+3y=3
2x-3=3
2x=6
x=3
x=3, y=-1