find the solution to the following system using substitution or elimination: y = 3x + 2 y = -2x – 8 A. (-2, -4).

Question

find the solution to the following system using substitution or elimination:
y = 3x + 2
y = -2x – 8
A. (-2, -4).
B. (-3/5, -34/5).
C. (-6/5, -8/5).
D. (1, 6)

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Thành Công 2 weeks 2021-08-29T03:06:20+00:00 2 Answers 0 views 0

Answers ( )

    0
    2021-08-29T03:07:31+00:00

    Answer: A

    Explanation:

    Just use substitution because it’s more efficient. Plug -2x-8 into y to make -2x-8=3x+2. Add 8 to both sides to get -2x=3x+10. Subtract 3x to both sides to get -5x=10. Divide -5 to both sides to get x=-2. Now, plug in x=-2 to one of the equations, let’s use y=3x+2. The equation would be y=3(-2)+2. Multiply 3 and -2 to get -6. Add -6 to 2 and you’ll result with y=-4.

    0
    2021-08-29T03:07:42+00:00

    It should be A (-2,-4). When using elimination.

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