Ask Question
15 October, 02:17

4x-4y=0

Y=2x+6

Solve by substitution

+2
Answers (1)
  1. 15 October, 04:52
    0
    Answer: x = - 6, and y = - 6 (-6, - 6)

    Step-by-step explanation: What we have here is a pair of simultaneous equations. Since we have been instructed to solve by substitution, we shall begin with the one which has one of the variables as having a coefficient of 1. We shall start with equation 2 which is,

    y = 2x + 6

    Having taken note of this, we can now go on to the other equation and substitute for the value of y.

    Hence, from equation 1,

    4x - 4y = 0 (substitute for the value of y)

    4x - 4 (2x + 6) = 0

    4x - 8x - 24 = 0

    -4x - 24 = 0

    Add 24 to both sides of the equation

    -4x = 24

    Divide both sides of the equation by - 4

    x = - 6

    Having calculated the value of x, we can now go on to substitute for the value of x in equation 2.

    Therefore,

    y = 2x + 6

    y = 2 (-6) + 6

    y = - 12 + 6

    y = - 6.

    So, x = - 6 and y = - 6
Know the Answer?
Not Sure About the Answer?
Get an answer to your question ✅ “4x-4y=0 Y=2x+6 Solve by substitution ...” 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