And it's elimination using addition and subtraction
x-y=1
x+y=3

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(2) Answers

emily97

Get one x+y=3 to y=x+3 and plug it into x-y=1 and you get x-(x+3)=1. Destitute the x and solve. Once you get what x equals plug it to to either equation for the value of x and solve for y