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

What is the solution to this system of linear equations: y-x=4 and y+2x=1 1) (-1,3) 2) (0,4) 3) (1,-1) 4) (-3,3)
Why does a pendulum eventually stop swinging?
Alex makes ceramic bowls to sell at a monthly craft fair in a nearby city. Every month, she spends $50 on materials for the bowls from a local art store. At the
What is the main idea of Truman's statement about the use of atomic weapons
what are two human uses for mosses?
how are the themes and topics different
The diagram shows a patio in the shape of a rectangle. The patio is 3.6m long and 3m wide. Mathew is going to cover the patio with paving slabs. Each paving sla
Determine the half-life of potassium if in 3460 years a 200 g sample decayed into 25 g
what are two human uses for mosses?
Why was there growing involvement of the USA in Europe in the years 1945-48 ??