using elimination process what is the answer for 14x+2y=18 -7x-4=9 use steps

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using elimination process what is the answer for

14x+2y=18
-7x-4=9

use steps

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    2022-01-11T17:20:17+00:00

    step 1; multiple equation 2 by -2: 14x+8y=-18
    step2: subtract this new equation from equation 1 to eliminate x:
    2y-8y=18-(-18)
    -6y=36
    y=-6
    step 3: substitute y=6 in equation 2: -7x-4*(-6)=9, -7x=-15, x=15/7

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