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# -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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- Anonymous8 years agoFavorite 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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