qbell2719 qbell2719
  • 17-06-2021
  • Mathematics
contestada

solve the simultaneous equation
2x - 5y = 9
3x + 4y = 2

Respuesta :

cwrw238 cwrw238
  • 17-06-2021

Answer:

x = 2, y = -1.

Step-by-step explanation:

2x - 5y = 9

3x + 4y = 2

Multiply first equation by -3 and the second by 2:

-6x + 15y = -27

6x + 8y = 4            Adding the 2 equations:

23y = -23

y = -1.

Now substitute this value for y in the first equation:

2x - 5(-1) = 9

2x = 9 +5(-1)

2x = 9 - 5

2x = 4

x = 2.

Answer Link

Otras preguntas

In the expansion of (ax+1)^7 the fifth term is 945x^3 Find the value of a.
What is 10/14 simplified
Many people go missing every year in our country. Why is it important that these people are never forgotten and constantly looked for Write in complete
Which line is an example of the poetic technique metonymy? “Let seed be grass, and grass turn into hay:” “I’m martyr to a motion not my own;” “I swear she
What jobs use density?
what words or phrases does spinelli use that show how he feels before he writes the poem "Goal to Go"?
x2 - 20 = 0 Solve for X
Why is it rude to send multiple copies of documents to people on the internet?​
In what way did the 1898 event portrayed in the image above become a turning point in U.S. history? (someone pls help me with this test)
What is reciprocity? A. It is the process by which architects apply for licensure to work in another state. B. It is the process by which architects earn a li