Mathematics

Question

9x + 2(3x + 7) = -31

1 Answer

  • Answer:

    x=-3

    Step-by-step explanation:

    Solve:

    9x+2(3x+7)= -31

    multiply the "3x" and the "7" by two (distributive property)

    [="6x" and "7"]

    add the "9x" and the "6x" [="15x"]

    subtract "14" from"-31" [= "-45"]

    divide "15x" from "-45"

    ="-3"

    Check:

    put the "-3" in for "x"

    multiply 9(-3) [=-27]

    multiply 3(-3) [=-9]

    distribute the 2 to the "-9" and the "7" [="-18" and "14"]

    add the "-18" and "14" [=-4]

    add the "-27" and the "-4"

    =-31 ✓

    What it looks like:

    Solve:

    9x+2(3x)+2(7)= -31

    9x+6x+14= -31

    15x+14= -31

    -14 -14

    15x= -45

    /15= /15

    x= -3

    Check:

    9x+2(3x+7)= -31

    9(-3)+2(3(-3)+7= -31

    -27+2(-9+7)= -31

    -27+(2(-9)+2(7))= -31

    -27+(-18+14)= -31

    -27+ (-4)= -31

    -31= -31✓

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