laquitawinston laquitawinston
  • 02-02-2015
  • Mathematics
contestada

3x+y=5 , 2x-2y=22 solve the system of equations by the addition method

Respuesta :

konrad509
konrad509 konrad509
  • 02-02-2015
[tex]3x+y=5\\ 2x-2y=22\\\\ 3x+y=5\\ \underline{x-y=11}\\ 4x=16\\ x=4\\\\ 4-y=11\\ -y=7\\ y=-7\\\\ \boxed{(x,y)=(4,-7)} [/tex]
Answer Link
eu99li
eu99li eu99li
  • 02-02-2015


3x+y=5

2x-2y=22 ...............2(x-y)=22 ⇒ x-y=11

3x+y=5

x-y=11                   (+)

3x+x+y-y=11+5

4x=16  /:4

x=4

x-y=11

4-y=11

-y=7 /*(-1)

y=-7


Answer Link

Otras preguntas

If a limb is not exercised, the related muscle will lose strength. True False
Grammy's Apple Orchard is selling apple cider in 34.7 ounce bottles for $2.09. Grammys competitor is selling 24.6 ounce bottles of cider for $1.99. Who is selli
The spongy material in the center of hollow bones is bone marrow. True False
what tissue keeps the bone from grinding on each other
What is the imaginary line on which an spinning sphere rotates?
Which of the following statements about communication is most accurate? A. Attitudes change day by day, while moods persist over time. B. Expressing your
I need help is it A B C or D
Why was cuzco significant to the inca??
I need help is it A B C or D
-8 ( 3-s) = 32 what is s