-3x+7<28 math help?

I dont want you to just write down the answer so can you please solve it out then i could see if i can do it myself :)Thank You

Update:

also how do i graph the solution on a number line

Update 2:

also how do i graph the solution on a number line

2 Answers

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  • Anonymous
    8 years ago
    Favorite Answer

    -3x+7 < 28

    Firstly, treat the "<" like an "=" so just solve the equation as you would with an equals sign

    Take the '-3x' to the other side to get rid of the negative (+3x)

    7 < 28 + 3x

    Now you want to subtract the 28 from both sides to get the x on one side.

    7 - 28 < 3x

    Now divide throughout by 3

    -21/3 < x

    and simplify

    -7 < x

  • 8 years ago

    -3x+7<28

    then

    -3x<21

    then divide by 7

    and since you are dividing by a negative, you change the sign

    so it equals

    x>-7

    Edit:

    You would just plot the answer (-7) on the number line

    Source(s): My brain
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