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The seventh grade math will accompany you to learn the answers.
The upper part is formula ①.

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

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