Question

Solve the equation.
3x - 3= -18

x = -7
x = -5
x = -3
x = 5

I will medal!!

Answer 1

You need to isolate x do you know what to do @rainbowswirl

Answer 2

Not exactly @greatlife44

Answer 3

Okay

you've got

3x-3 = -18 right?

we have 3x -3

this is subtraction. we must do the opposite of subtraction what's that?

Answer 4

addition @greatlife44

Answer 5

Yes. we and we must do this to both sides of our equation so what would that be

Answer 6

What do I add to both sides? @greatlife44

Answer 7

3 but can you see why based on what I just said?

Answer 8

Oh, yes, now I see it. So, add 3 to both sides of 3x -3?? @greatlife44

Answer 9

excellent

Answer 10

Continue and write out what we have so far

Answer 11

Isn't that 6 on each side?? @greatlife44

Answer 12

3x-3 = -18
+3 +3

3x = -15

Answer 13

Notice how when we add 3 to both sides 3 cancels out because

-3+3 = 0

so we're just left with

3x = -18+3

Answer 14

Okay, what do you do next? @greatlife44

Answer 15

we have 3x = -15

Answer 16

what do you think we need to do now?

Answer 17

B. x=-5
source: http://www.wolframalpha.com/input/?i=3x-3%3D-18

Answer 18

I'm not sure, that why im struggling @greatlife44

Answer 19

thats*

Answer 20

-18 + 3 = -15. -15 ÷ 3 = -5. x = -5

Answer 21

giving him a direct answer won't help him

Answer 22

sorry, you guys already did that so I was just trying to show it was right

Answer 23

her*

Answer 24

think about it

we have

3x = -15

3x means three times x

we need to do the opposite of multiplication to isolate x.

Answer 25

Can anyone help me with more??

Answer 26

3 x -5 = -15.

-15 - 3 = 18

Answer 27

sure.

Answer 28

Remember, negative are opposed.

So the less numbers in positive, would be the greater numbers, since close to zero.

Answer 29

Ok^

Answer 30

also if you take -3 and move it to the -18 you get -18 - 3 now because you brought over the - 3 you change it to + 3, get it? so it becomes x -3 + 3 = -18 + 3

Answer 31

Solve the equation.

r/2 -6 =14

r =40
r =34
r =20
r =16

Answer 32

please close this post and make a new one with your new question

Answer 33

40

Answer 34

Do it yourself,

40/2 = what?

Answer 35

then - that by 6.

Actually easy, just think about it :)!

Answer 36

I don't mind if you put it into this post.

Answer 37

Ok @MissSmartiez

Answer 38

Fire away.