Math

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Hello, I need to know if I have the right answers to these questions.
2x-y=3 question is which of the following points lie on the line. is the answer 0,3 (-1,1) (2, 1) (-3, 1) (-3, ) or (1, 2) I chose the answer (-3, 1) is that right,
second question: If x+7andY+2 then x-3y= would the answer be 1 thanks I am not good with algebra

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