Solve the system of linear equations using elimination. 10x + 7y = 12 8x + 7y = 18 PLEASE HELP ME

Question

Solve the system of linear equations using elimination.

10x + 7y = 12
8x + 7y = 18

PLEASE HELP ME

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Charlie 1 week 2021-09-13T11:42:29+00:00 2 Answers 0

Answers ( )

    0
    2021-09-13T11:43:45+00:00

    Myyyy favvvv method

    So
    10x+7y=12
    Now take the other equation and make it negative

    10x+7y=12
    -8x-7y=18
    So solve
    2x=-6
    ————-
    2. 2

    X=-3

    No plug in

    -30+7y=12
    +30
    7y=42

    Y=6
    (-3,6)

    0
    2021-09-13T11:44:09+00:00

    10x + 7y = 12

    -(8x + 7y = 18)

    ———————-

    2x=-6

    x=-3

    Then plug in -3 for x into any of the equations to get y.

    8x + 7y = 18

    8(-3)+7y=18

    7y=42

    y=6

    answer: x=-3, y=6, intersection point: (-3,6)

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