The lower part is formula ②.
Solution: The formula 1X6 can be changed to 3x-3y-2y=6, that is, 3x-5y=6③.
Equation ②x6 can be changed to 2x+2y=3y, that is, 2x = y.
Substituting y=2x into ③ gives 3x- 10x=6.
So x=-6/7.
y=2x=- 12/7