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4 years ago

6x+7y=20 Y=2x How do u solve this one ¿

Mathematics

2 answers:

lina2011 [118]4 years ago

4 0

$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)}
$

Minchanka [31]4 years ago

3 0

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 :(

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\\\\\\
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