Question

solve the system by the substitution method
3x-9y=3
-2x+6y=5

Answer 1

are you looking for x

Answer 2

so for the first one divide both sides by 3

Answer 3

then add 9 to both sides

Answer 4

so for the first one x=9

Answer 5

for the second one divide both sides by -2

Answer 6

then subtract 6

Answer 7

then you have xy= -8.5

Answer 8

System has no solution; because ich you multiply first by 2 and second equation by 3 you get:
6x-18y = 6
-6x +18y = 15

after add together you get:

0= 6+15

So It's not possible -> equations has no solutions

Also checkout machine solution:
http://www.equationcalculator.org/?input=3x-9y%3D3%0D%0A-2x%2B6y%3D5&submit=Calculate