Danny56592 Danny56592

16-02-2015
Mathematics

Answered

6x+7y=20

Y=2x

How do u solve this one ¿

Verified Answer :

serdaryilmaz serdaryilmaz

16-02-2015

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 :(

Answer Link

konrad509 konrad509

16-02-2015

\(6x+7y=20\\ y=2x\\\\ 6x+7\cdot2x=20\\ 6x+14x=20\\ 20x=20\\\\ x=1\\\\ y=2\cdot1\\ y=2\\\\ \boxed{(x,y)=(1,2)}\)

Answer Link

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