03-06-2015
Mathematics

contestada

−4x + y = 6
−5x − y = 21

Respuesta :

apologiabiology apologiabiology

03-06-2015

assuming x=x and y=y in both equations
add them together

-4x+y=6
-5x-y=21 +
-9x+0y=27
-9x=27
divide by 9
-x=3
multiply -1
x=-3

subsiutte
-4x+y=6
-4(-3)+y=6
12+y=6
subtract 12
y=-6

x=-3
y=-6
the soultion set is in (x,y) form
(-3,-6)

Answer Link

Otras preguntas

find the value of x easy math question #3 please help

9) Hamlet speaks/torments Ophelia with sexual jokes and innuendos. What are some of the things that he is saying to her

PLEASE HELP! NEED ANSWERS FOR A,C,D,E,F

Use Pythagorean theorem to find the missing side of the triangle write the exact answer no decimals Last two options: 300 2/10

why do points of concurrency matter?

Why might having mud in an ecosystem be important? Mud can replace producers in an ecosystem. Pigs love to wallow in mud. Mud can replace consumers in an ecosys

Determine the range of the following graph: Note: Send me a picture of your answer

When do Democrats and Republicans compromise?

ques1. Name three substances that are not mixtures.2. Name three substances that are mixtures.

Identify a possible measure of the reference angle sketched in standard position 300 degrees 60 degrees -60 degrees -300 degrees