Ask Question
28 August, 18:28

X-y=3

7x-y=-3

What is the answer?

+3
Answers (2)
  1. 28 August, 19:29
    0
    x is-1 and y is - 4
  2. 28 August, 20:28
    0
    x=-1, y=-4

    Step-by-step explanation:

    x-y=3 ... (1)

    7x-y=-3 ... (2)

    From (1) make x the subject of formula by adding y to both sides

    x=3+y ... (3)

    Substitute (3) into (2)

    7 (3+y) - y=-3

    Open the bracket

    21+7y-y=-3

    21+6y=-3

    Substrate 21 from both sides

    6y=-24

    Divide both sides by 6

    y=-4

    Substitute the value of y into (3)

    x=3-4

    x=-1

    Therefore x is-1 and y is - 4
Know the Answer?
Not Sure About the Answer?
Get an answer to your question ✅ “X-y=3 7x-y=-3 What is the answer? ...” in 📙 Mathematics if there is no answer or all answers are wrong, use a search bar and try to find the answer among similar questions.
Search for Other Answers