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

Can someone please help me with problem #1 of the Rational Roots Theorem and Factoring/Solving worksheet? Please show your work.Directions: State the factors of

A bucket has a radius of 11cm and is 22cm tall. I am going to use it to fill up a padding pool that has dimensions 1m by 3m by 1m. How many time will I have to

Solve the absolute value equation for x. |4 - 2x| + 6 = 18 Enter your answers in the blanks in order from least to greatest. x = first answer or second ans

Which characteristic of a dog is inherited a Barking b Doing tricks c Walking on a leash d Whining for food

suppose you are the general manager of DDC.write a press release for increasing the price of product

What was Sherman's strategy called and what does it mean?

What is the average rate of change of f(x) from x = -3 to x = 6?

Write the indicated term of the binomial expansion. (x+y)^(10); 4th term

Mr. Numkena volunteered to drive Hinton and his friends to the school dance. the car can carry up to 5 people, including the driver how many friends can ride in

Explain the process of how clouds form