Ask Question
4 January, 09:43

Simultaneous equations

3x + 2y = 13

x + 2y = - 1

+3
Answers (1)
  1. 4 January, 11:14
    0
    {x = 7, y = - 4

    Step-by-step explanation:

    Solve the following system:

    {3 x + 2 y = 13 | (equation 1)

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

    Subtract 1/3 * (equation 1) from equation 2:

    {3 x + 2 y = 13 | (equation 1)

    {0 x + (4 y) / 3 = (-16) / 3 | (equation 2)

    Multiply equation 2 by 3/4:

    {3 x + 2 y = 13 | (equation 1)

    {0 x+y = - 4 | (equation 2)

    Subtract 2 * (equation 2) from equation 1:

    {3 x+0 y = 21 | (equation 1)

    {0 x+y = - 4 | (equation 2)

    Divide equation 1 by 3:

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

    {0 x+y = - 4 | (equation 2)

    Collect results:

    Answer: {x = 7, y = - 4
Know the Answer?
Not Sure About the Answer?
Find an answer to your question ✅ “Simultaneous equations 3x + 2y = 13 x + 2y = - 1 ...” in 📘 Mathematics if you're in doubt about the correctness of the answers or there's no answer, then try to use the smart search and find answers to the similar questions.
Search for Other Answers