Solve the following system of equations: 5x – 2y = 4 x + 2y = 8

Question

Solve the following
system of equations:
5x – 2y = 4
x + 2y = 8

in progress 0
Thu Thảo 5 months 2021-08-27T16:02:49+00:00 1 Answers 3 views 0

Answers ( )

    0
    2021-08-27T16:04:39+00:00

    Answer:

    x=2

    y=3

    Explanation

    1. Solve x + 2y = 8 for x:

    x + 2y = 8

    x+2y + − 2y = 8 + −2y(Add -2y to both sides)

    x = −2y + 8

    2. Substitute −2y + 8 for “x” in 5x − 2y =4

    5x − 2y = 4

    5 (−2y + 8) − 2y =4

    −12y + 40 = 4 (Simplify both sides of the equation)

    −12y + 40 + −40 = 4 + −40(Add -40 to both sides)

    −12y = −36 (Divide both sides by -12)

    y = 3

    3. Substitute 3 for “y” in x= −2y + 8

    x = −2y + 8

    x = (−2) (3) + 8

    x = 2 (Simplify both sides of the equation)

    Answer:

    x = 2 and y = 3

Leave an answer

Browse

Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )