Ask Question
9 December, 03:44

Y=7x + 10

y=-4x - 23

+5
Answers (2)
  1. 9 December, 03:48
    0
    x = - 3

    y = - 11

    Step-by-step explanation:

    to solve this linear equation using substitution method

    let us say that

    y=7x + 10 ... equation 1

    y = - 4x - 23 ... equation2

    substitute equation 1 into equation 2

    7x + 10 = - 4x - 23

    collect the like terms

    7x + 4x = - 23 - 10

    11x = - 33

    divide both sides by the coefficient of x which is 11

    11x/11 = - 33/11

    x = - 3

    put the value of x = - 3 into equation 2

    y = - 4x - 23 ... equation2

    y = - 4 (-3) - 23

    y = 12 - 23

    y = - 11

    therefore the value of x and y is - 3 and - 11 respectively
  2. 9 December, 04:00
    0
    That's two lines; presumably we want the meet.

    7x + 10 = - 4x - 23

    11 x = - 33

    x = - 3

    y = 7x + 10 = - 11

    Answer: x=-3, y=-11

    check:

    -4 (-3) - 23 = 12-23 = - 11, good
Know the Answer?
Not Sure About the Answer?
Find an answer to your question 👍 “Y=7x + 10 y=-4x - 23 ...” 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