Alyyyyyyy Alyyyyyyy

01-12-2015
Mathematics

contestada

solve for x and y
-2x-y=-9
5x-2y=-9

Respuesta :

taskmasters taskmasters

01-12-2015

we use equation 1 first.
-2x -y = -9

-y = -9 + 2x

y = 9 -2x

We substitute value of y in equation 2

5x - 2 (9 - 2x) = -9

5x -18 - 4x = -9

5x - 4x = -9 + 18

x = 18 -9

x = 9

We now find the value of y

-2x -y = -9

-2 (9) - y = -9

-18 - y = -9

-y = -9 + 18

y = 9 - 18

y = -9

Answer Link

Otras preguntas

industrialization in the north caused?

The decimal 0.3 represents 1/3. What type of number best describes 0.9, which is 3 times 0.3? Explain.

What is the complementary of 0.7 in geometry

Write two decimals that are equivalent to 3.7

Verbal expression of 15 + r

if you roll a 6 you receive a gold medal, if you roll a 4 or 5 you receive a silver, if you roll a 1, 2 or 3 you receive a bronze, given the above what are the

A community wants all of its citizens to become more physically active. Which of these strategies would be the most practical solution? A.Purchasing a bicycle f

What is the answer to x+5=2x

Two times the difference of a number decreased by five is fourteen. what is the number.

Clint spends 1/2 hour practicing trumpet, 3/4 hour doing tasks around the house, 1 1/2 hour doing homework, and 1/4 hour cleaning his room. he is finished at 7: