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katiedelgadillo
26.02.2021 •
Mathematics
Solve the system of linear equations.
x−y=3
−2x+y=−5
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Ответ:
x=2 and y=-1
Step-by-step explanation:
x−y=3
x−y+y=3+y(Add y to both sides)
x=y+3
Substitutey+3forxin−2x+y=−5:
−2x+y=−5
−2(y+3)+y=−5
−y−6=−5(Simplify both sides of the equation)
−y−6+6=−5+6(Add 6 to both sides)
−y=1
−y
−1
=
1
−1
(Divide both sides by -1)
y=−1
Substitute−1foryinx=y+3:
x=y+3
x=−1+3
x=2(Simplify both sides of the equation)
I hope this Helps and have a great day
Ответ: