Ask Question
26 April, 13:42

If x-y=10 and x squared-y squared = 40 then y=?

+5
Answers (2)
  1. 26 April, 14:11
    0
    Solve for y in the first equation

    -y=-x+10

    y=x-10

    Now substitute y in the second equation

    x^2 - (x-10) ^2=40

    x^2 - (x^2-20x+100) = 40

    20x-100=40

    20x=140

    x=7

    Plug the value of 7 in to any of the equations

    7-y=10

    y = (-3)

    Final answer: y = - 3
  2. 26 April, 17:08
    0
    12 I know I gave you the wrong answer
Know the Answer?
Not Sure About the Answer?
Find an answer to your question ✅ “If x-y=10 and x squared-y squared = 40 then y=? ...” 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