kalisover kalisover
  • 14-07-2020
  • Mathematics
contestada

Which of the following (x,y) pairs is the solution for the system of equations x+2y=4 and -2x+y=7

Respuesta :

Space
Space Space
  • 14-07-2020

Answer:

(-2 ,3)

Step-by-step explanation:

Step 1: Rewrite first equation

x = 4 - 2y

-2x + y = 7

Step 2: Substitution

-2(4 - 2y) + y = 7

Step 3: Solve y

-8 + 4y + y = 7

-8 + 5y = 7

5y = 15

y = 3

Step 3: Plug in y to find x

x + 2(3) = 4

x + 6 = 4

x = -2

Answer Link

Otras preguntas

what is another phrase for "times up"
Who is known as the father of toxicology
Explain the relationship between technology and standard of living.
Which is a law and which is a theory 1.Plate Tectonics 2.For every reaction , there is an equal and opposite reaction 3.Evolution & Natural selection 4
a number that uses place value and a decimal point to show part of a whole
samira ran 3 more miles than twice the number of miles ada ran. which statement makes this comparison using the correct variable expression? if ada ran m miles,
Which of the following transfers energy in the form of vibrating electric and magnetic fields? A. An electromagnet B. A generator C. An induced c
In which colonial region were the cash crops tobacco, rice, and indigo important?
23X-4=20 Help please
11457 rounded to the nearest hundred