wyattc20 wyattc20
  • 03-01-2020
  • Mathematics
contestada

Solve the system of equations using elimination. Make sure to show all work and find the value of both x and y
x-3y = 7
3x + 3y = 9
8x+ 3y = 1
4x + 2y = 0

Respuesta :

Yang100
Yang100 Yang100
  • 03-01-2020

Answer:

x=4, y=-1. (4, -1).

Step-by-step explanation:

x-3y=7

3x+3y=9

---------------

x=3y+7

3(3y+7)+3y=9

9y+21+3y=9

12y+21=9

12y=9-21

12y=-12

y=-12/12

y=-1

x-3(-1)=7

x+3=7

x=7-3

x=4

Answer Link

Otras preguntas

A 1 digit number and a 3 digit number have a sum of 205.  The same two number have a difference of 195, a product of 1,000 and a quotient of 40.  What are the t
What two major processes are involved in the oxygen cycle?
What is Sir Francis Drake hardships
When was World War I?
Was the Gold Rush a good or bad thing for the United States?
Why is RNA necessary to act as messenger?
What are two different ways to describe and label the layers of the Earth?
Does the depth of a pan affect how water freezes?
A child is standing across the street from his apartment . His mother is on their balcony . The angle of elevation between the child's eyes and his mothers eyes
A passenger on a boat moving at 1.70 m/s on a still lake walks up a flight of stairs at a speed of 0.60 m/s , as shown in the figure . The stairs are angled at