jmasa2001
jmasa2001 jmasa2001
  • 12-09-2020
  • Mathematics
contestada

solve using elimination method

-3x + 5y = 8
-2x + 7 y = -2​

Respuesta :

Аноним Аноним
  • 12-09-2020
  • Answer:

x = - 6

y = - 2

  • Step-by-step explanation:

-3x + 5y = 8  | ×(-2)

-2x + 7 y = -2​ | ×3

6x - 10y = - 16

- 6x + 21y = - 6

add

6x - 6x - 10y + 21y = - 16 - 6

11y = - 22

y = - 22 : 11

y = - 2

replace y

- 2x + 7(-2) = - 2

- 2x - 14 = - 2

- 14 + 2 = 2x

2x = - 12

x = - 12 : 2

x = - 6

Answer Link

Otras preguntas

Why is it so important for medical doctors to be able to use a microscope?
100-99+98-97+96-95+...+8-7+6-5+4-3+2-1
Explain what happens to particles in diffusion. What causes diffusion?
What is the acceleration of a 50kg object that has been given a 20N push?
Make 92 one thousand times smaller.
True or False: Diagonals of a trapezoid are congruent.
Use properties to find the sum or product  93 + (68+7)
Give 2 examples of the following relationships between organisms - producer/consumer, -predator/prey, mutualis parasitism
Give 2 examples of the following relationships between organisms - producer/consumer, -predator/prey, mutualis parasitism
How do the actions of earthworms improve soil quality? How does this impact the amount of biomass an ecosystem can support?