how do you solve this Pre algebra problem?

david-holmes_60bd14372170ddavid-holmes_60bd14372170d
in Science & Mathematics

How do you solve & check this problem?

If the number is subtracted from three times the number the result is -8 what is the number?

Comments

  • adriana-aadriana-a

    Lets call x the missing number.

    So you know that three times the number : 3x

    and that you subtract that number to 3x: 3x-x

    and that all of that equals -8: 3x-x=-8

    So that is your equation: 3x - x = -8

    Now just solve for x.

    So you can factor out an x: x(3-1)=-8

    2x=-8

    then divide by 2

    x=-4

    If you plug in -4 into the original equation it should give you -8

    3*(4)-4 =-8

    that is correct. therefore the answer is correct

    hope this helps

  • roxyroxy

    3x - x = -8

    2x - -8

    x = -4

    check:

    3(-4) + 4 - -8

    -12 + 4 = -8

    the answer is correct

  • joel-thompson_60bd14397b000joel-thompson_60bd14397b000

    x = 20 - 4x x + 4x = 20 - 4x + 4x, (upload 4x to the two facets) 5x = 20 (Divide 5 with the aid of the two facets) x = 4, there is your answer. properly, including 4x with the aid of the two facets will do away with the - 4x on the wonderful ingredient and integrate with the x on the different ingredient a million + 4 = 5. this way you have x with the aid of itself that's what you frequently attempt to do on each and each physique of those problems.

  • comocomo

    3x - x = - 8

    2x = - 8

    x = - 4

    Number is - 4

  • joythe-kjoythe-k

    3X-X = -8

    2X = -8

    2X/2 = -8/2

    X = -4

  • macvy119macvy119

    3x-x=-8

    2x=-8

    x=-4

  • brandonmalbertbrandonmalbert

    3X - X = -8

    2X = -8

    X = -4

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