Question

How do I do this?

3x - 5 <10?

Answer 1

Substitute :3 Do you know how to do that?

Answer 2

All i could do was this 3x - 5 x 10
+5 +5

Answer 3

Not really ;/

Answer 4

switch 5 to the to the other side and make it a positive

Answer 5

so 3x +5 <10?

Answer 6

no 3x < 10 + 5
then 3x < 15
then divide both sides by three and you get x < 5

Answer 7

You need to add 5 to both sides: \[3x−5+5<10+5\]
@AnimeWover What is 10 + 5?

Answer 8

10+ 5 = 15

Answer 9

Good

Answer 10

then divide both sides by three
and you get ???? x < 5

Answer 11

What does the X mean? Why is it there though?

Answer 12

Okay, that's fine :) \[\large3x-5<10\]\[\large-5+5=0\]\[\large10+5=15\]\[\large3x<15\]
As 3x is less than fifteen, not equal to, \[\large x\neq5\]

Answer 13

you are trying to find the unknown number

Answer 14

x represents the unknown number

Answer 15

x is the variable all it is the num
ber you are trying to find

Answer 16

Now, we divide both sides by 3: \[\frac{ 3x }{ 3 } < \frac{ 15 }{ 3 }\]
\[\frac{ 3x }{ 3 } = x\]
WHat is 15/3 @AnimeWover

Answer 17

15 / 3 = 5

Answer 18

soooo x is 5

Answer 19

X cannot equal 5.

Answer 20

3x is less than 15, not 15

Answer 21

x<5 right?

Answer 22

Therefore x is less than 5, not 5.

Answer 23

ik that if u were to look at the equation i did above that what i had...

Answer 24

x < 5 is the answer

Answer 25

i had that all the way on the top lol

Answer 26

Do you understand? @AnimeWover

Answer 27

just one rule to remember when you switch a number to either side of the equal sign ALWAYS change the sign..if its positive make it a negative and if its a negative make it a positive

Answer 28

Yes ^

Answer 29

oh

Answer 30

so 3x + 5 < 10

5+5

10+5

Answer 31

Huh? I thought you made it zero and added/subtracted it from the sum/product/etc.

Answer 32

3 / 15 = 5

x < 5

Answer 33

I think i'm skipping steps. Sorry

Answer 34

i am a lost cause with math XD

Answer 35

Step 1: Add 5 to both sides.
Step 2: Divide both sides by 3

Answer 36

Yes, that makes more sense^

Answer 37

so it ends up being

3x - 5 = 10
3x = 10 + 5
3x = 15
3/3 x = 15/3
x = 5

Answer 38

F_Jay, we do not know what x is equal to. We only know it is less than 5.

Answer 39

lol sorry i keep forgtrtting im so used to the = sign

Answer 40

Wait hoiw are we diving BOTH sides?

Answer 41

to get x by itself

Answer 42

oh

Answer 43

No problem :)
We are dividing both sides by 3 because x is being multiplied, and the end result is the product of x.

Answer 44

I'll put it more in detail:
Step 1: Add 5 to both sides: \[3x−5+5<10+5\]
The 5's the the left side cancel out since: -5 + 5 = 0. On the right side, 10 + 5 = 15.
\[3x<15\]

Step 2: Divide both sides by 3: \[\frac{ 3x }{ 3 } < \frac{ 15 }{ 3 }\]
On the left side, 3 divided by 3 = 1x, 1x is the same as x. On the right side, 15 divided by 3 = 5.
\[Answer: x < 5\]

Answer 45

yup :)

Answer 46

ohhh

Answer 47

Yup, does that help you understand?

Answer 48

how do we know X is less than 5 though?

Answer 49

because:
< = Less than
> = Greater than

Answer 50

this is how i remember those signs.... < faces the negative side ( negative=less than) and > positive=greater than) faces the positive side

Answer 51

ok, makes much more sense XD

Answer 52

\[:)\]