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Sagot :
if y=2x
7y=14x .
6x+14x=20
20x=20
x being 1 x=1
we found x .
and putting in this problem.
y=2x
y will be 2 , y=2
i am so sorry for my bad english :(
7y=14x .
6x+14x=20
20x=20
x being 1 x=1
we found x .
and putting in this problem.
y=2x
y will be 2 , y=2
i am so sorry for my bad english :(
[tex]6x+7y=20\\
y=2x\\\\
6x+7\cdot2x=20\\
6x+14x=20\\
20x=20\\\\
x=1\\\\
y=2\cdot1\\
y=2\\\\
\boxed{(x,y)=(1,2)}
[/tex]
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