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Alice Lyons
Mathematics
15 April, 05:11
If x-2y=0 and 3x+y=7 whats the vaule of * ?
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Valentin Sanchez
15 April, 05:38
0
The first equation may be written
x = 2y
The second equation is
3x + y = 7
Substituting
3 (2y) + y = 7
6y + y = 7
7y = 7
y = 1
x = 2y = 2
Answer: 2
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