7x+2y=47 5x-4y=1 use elimination method

Question

7x+2y=47
5x-4y=1
use elimination method

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Nho 4 years 2021-09-03T14:45:35+00:00 1 Answers 37 views 0

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  1. Latifah
    0
    2021-09-03T14:46:58+00:00
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    Answer:

    x=5, y=6

    Step-by-step explanation:

    7x+2y=47

    5x-4y=1

    to use elimination method , you want to add the two equations together so that either x or y cancels out. For these equations, we will multiply the first equation by 2. (This will cancel out y value)

    2(7x+2y)=2(47)

    14x+4y =94

    ————————

    add above equation to second equation:

    14x+4y=94 above equation

    5x-4y=1 second equation

    19x=95 added together

    x=5

    —————————————

    ‘solve for y by substituting x value (5) into either original equation

    5x-4y=1

    5(5)-4y=1

    25-4y=1

    -4y=-24

    y=6

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