xandermdel
xandermdel xandermdel
  • 03-04-2020
  • Mathematics
contestada

a solution of a system of linear equations

x - y = 5
- 3 x + y = - 1

Respuesta :

ghanami
ghanami ghanami
  • 05-04-2020

Answer:

one solution : (-2 ; -7)

Step-by-step explanation:

hello :

x - y = 5 ....(*)

- 3 x + y = - 1 ....(**)

by (*) : y=x-5

by(**) : y = 3x-1

3x-1 = x -5

3x-x=-5+1

2x= -4

x= -2

but : y = x-5    so : y= -2-5=-7

one solution : (-2 ; -7)

Answer Link

Otras preguntas

Some mobile apps are designed to be compatible with popular ____ such as microsoft office. a. web-based software b. system utilities c. internet utilities d. de
In the diagram below, BC is an altitude of ABD. To the nearest whole unit, what is the length of CD?
What similarities do all French speaking countries have?
What is the molecular formula of a compound given the molar mass of the compound is 62.18 g/mol and the empirical formula is c2h7?
Please help me solve 5x-2=1
The interpretation of the Constitution as a “living document” is also known as __________.
If f(x) Is the total cost, in dollars, of x cookies, which of the following statements best describes the meaning of f(3)= 9 A. The total cost of 3 cookies is
In circle C, r = 32 units. What is the area of circle C?
A researcher is trying to design an experiment to measure the amount of energy a person uses during different activities. He proposes to measure heart rate as a
Most of south america has a population density of __________ people per square kilometer.