Ask Question
18 June, 12:28

What is x-2y=-1 and 2x+y=4 using elimination step by step

+4
Answers (1)
  1. 18 June, 12:47
    0
    x = 7/5, y = 6/5

    Step-by-step explanation using elimination:

    Solve the following system:

    {x - 2 y = - 1 | (equation 1)

    2 x + y = 4 | (equation 2)

    Swap equation 1 with equation 2:

    {2 x + y = 4 | (equation 1)

    x - 2 y = - 1 | (equation 2)

    Subtract 1/2 * (equation 1) from equation 2:

    {2 x + y = 4 | (equation 1)

    0 x - (5 y) / 2 = - 3 | (equation 2)

    Multiply equation 2 by - 2:

    {2 x + y = 4 | (equation 1)

    0 x+5 y = 6 | (equation 2)

    Divide equation 2 by 5:

    {2 x + y = 4 | (equation 1)

    0 x+y = 6/5 | (equation 2)

    Subtract equation 2 from equation 1:

    {2 x+0 y = 14/5 | (equation 1)

    0 x+y = 6/5 | (equation 2)

    Divide equation 1 by 2:

    {x+0 y = 7/5 | (equation 1)

    0 x+y = 6/5 | (equation 2)

    Collect results:

    Answer: {x = 7/5, y = 6/5
Know the Answer?
Not Sure About the Answer?
Find an answer to your question 👍 “What is x-2y=-1 and 2x+y=4 using elimination step by step ...” in 📗 Mathematics if the answers seem to be not correct or there’s no answer. Try a smart search to find answers to similar questions.
Search for Other Answers