Danny56592
Danny56592
16-02-2015
Mathematics
contestada
6x+7y=20
Y=2x
How do u solve this one ¿
Respuesta :
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
[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]
Answer Link
VER TODAS LAS RESPUESTAS ( 29+ )
Otras preguntas
what landmark would you like to visit in the southeast? why?
The tree of life is made up of which domains?
Suppose a triangle has sides a, b, and c let theta be the angle opposite the side of length a. If cos theta < 0 what must be true? a- b^2+c^2>a^2. b- a^
Eisenhower, Kennedy, and Johnson all approved of the United States backing the South Vietnamese in their civil war. True or False.
In an experiment, a student mixed a substrate and an enzyme. Which statement BEST explains the reaction? A)The enzyme binds to the active sites on the substrat
Steven wants to buy a $565 bicycle.Steven has no money saved,but will be able to deposit $30 into a savings account when he receives his paycheck each Friday.Ho
Lenders always accept applications for credit. True or False Credit tends to cost individuals more than paying in cash. True or False Credit cards all use the
The difference between 3 times a number and 21
Multiple Choice 1. The sides of a triangle are in the ratio 3 : 4 : 5. What is the length of each side if the perimeter of the triangle is 90 cm? (1 point) A. 2
Why are stage directions important in order to understanding a play?
