larryfms16lbp598cw larryfms16lbp598cw
  • 13-04-2018
  • Mathematics
contestada

use addition to solve the linear system of equations 3x - y = 6 y = x - 4

Respuesta :

Аноним Аноним
  • 13-04-2018
3x - y = 6     ------------ (1)
y = x - 4       ------------ (2)

From (1) + (2) :
( 3x -  y) + y = 6 + (x - 4) 
3x - y + y = 6 + x - 4
3x = x + 2
2x = 2
x = 1 -------------  Sub into (2)

y = x - 4
y = 1 - 4
y = -3

Answer: x = 1, y = -3
Answer Link

Otras preguntas

A 4-digit combination lock can be opened only if a correct combination of digits from 0-9 is chosen. Find the probability of guessing the correct combination if
How are carbohydrates "protein sparing"
Question 2 A birthday cake in the shape of the right-circular cylinder of radius 15cm and thickness 10cm is cut into smaller pieces. One of the piece is shown.
Graph the function y = 4x4 – 8x2 + 4. Which lists all of the turning points of the graph? (0, 4) (–1, 0) and (1, 0) (–1, 0), (0, 4), and (1, 0) (–4, 0), (–1, 0)
Explain why the plant with the mutated psaB gene was dying
Which steps are needed to solve this equation? . b + 6 = 21
Read the underlined phrase. What is the most likely reason the poet includes this metaphor? to tell about the way that Frida’s hair moves to indicate that Frida
answer?......................
Which would a scientist most likely do before asking a question that could lead to a scientific experiment?.
HELPPPPPP ITS FOR MY FINALLLL click the photo below