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Asked by
Jillian
Solve by substitution:
x+y=9
y=2x
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Answers
Answered by
Dj
x+y=9 2x=4 because 2x2=4
y=2x
x+2x=9
x+4=9
-4 -4
x=5
x+y=9
chick answer by 5+4=9
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