SOLUTION: solve the following systems of equation x-y=3 2x-y=-1

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Question 37232This question is from textbook
: solve the following systems of equation
x-y=3
2x-y=-1 This question is from textbook

Answer by jcmtnez(53) About Me  (Show Source):
You can put this solution on YOUR website!
We can solve this system by substitution:
x-y=3, From this equation we get x=3+y
2x-y=-1, Substituting in the second equation we get 2(3+y)-y=-1,
solving 6+2y-y=-1, y=-1-6, y=-7,
And replacing the obtained value in the equation x=3+y, we obtain x=3+(-7),
x=-4
The solutions to the system are x=-4, y=-7.
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