jaquelinelopez jaquelinelopez
  • 29-01-2015
  • Mathematics
contestada

2x-4y=2 -2x+3y=0 elimination

Respuesta :

naǫ
naǫ naǫ
  • 30-01-2015
[tex]2x-4y=2 \\ \underline{-2x+3y=0} \\ -4y+3y=2+0 \\ -y=2 \\ y=-2 \\ \\ 2x-4y=2 \\ 2x-4 \times (-2)=2 \\ 2x+8=2 \\ 2x=2-8 \\ 2x=-6 \\ x=\frac{-6}{2} \\ x=-3 \\ \\ (x,y)=(-3,-2)[/tex]
Answer Link
eu99li
eu99li eu99li
  • 30-01-2015

2x-4y=2

-2x+3y=0

-------------------- (+)

3y-4y=2

-y=2   /*(-1)

y=-2

2x-4y=2

2x-4*(-2)=2

2x+8=2   /-8

2x=-6

x=-3


Answer Link

Otras preguntas

I need help with math motion problems. Ex. Two cars left a shop. The first car travels 55 mph and left at 9:00 am. The other car left one hour later at 75 mph.
A bank paid 2.3% interest on a money market account. What is 2.3% written as a decimal
Only 0.001% of water on Earth is present as soil moisture. In the water cycle, which of the following can happen to this water next?
What is the 19th Amendment to the US Constitution?
Please tell me what is the Difference between "Cannot" and "Can Not"?
why do you use cubic units and not square units to find the volume of a solid figures
Christy bought an 8 foot piece of lumber to trim a bookshelf  . Altogether, she needs 100 inches of lumber for the trim .Did Christy buy enough lumber? Explain
(Coulomb's Law) can anyone tell me if there is any cases in which the electrostatic force between 2 objects is 0?
write this equation in standard form 9x^2-4y^2-24y-72=0
A bag contains 2 red, 4 yellow, and 6 blue marbles.Two marbles are drawn at random. Find the portability that both are blue.