Solve the equation.
3x - 3= -18

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

I will medal!!

Question

Solve the equation. 
3x - 3= -18

x = -7
x = -5
x = -3
x = 5

I will medal!!

greatlife44 · Answer

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

anonymous · Answer

Not exactly @greatlife44

greatlife44 · Answer

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?

anonymous · Answer

addition @greatlife44

greatlife44 · Answer

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

anonymous · Answer

What do I add to both sides? @greatlife44

greatlife44 · Answer

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

anonymous · Answer

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

greatlife44 · Answer

excellent

greatlife44 · Answer

Continue and write out what we have so far

anonymous · Answer

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

greatlife44 · Answer

3x-3 = -18 
    +3     +3 

3x = -15

greatlife44 · Answer

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

anonymous · Answer

Okay, what do you do next? @greatlife44

greatlife44 · Answer

we have 3x = -15

greatlife44 · Answer

what do you think we need to do now?

anonymous · Answer

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

anonymous · Answer

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

anonymous · Answer

thats*

study312 · Answer

-18 + 3 = -15. -15 ÷ 3 = -5. x = -5

greatlife44 · Answer

giving him a direct answer won't help him

study312 · Answer

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

anonymous · Answer

attachment

greatlife44 · Answer

her*

greatlife44 · Answer

think about it 

we have 

3x = -15 

3x means three times x 

we need to do the opposite of multiplication to isolate x.

anonymous · Answer

Can anyone help me with more??

misssmartiez · Answer

3 x -5 = -15. 

-15 - 3 = 18

misssmartiez · Answer

sure.

misssmartiez · Answer

Remember, negative are opposed.

So the less numbers in positive, would be the greater numbers, since close to zero.

anonymous · Answer

Ok^

study312 · Answer

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

anonymous · Answer

Solve the equation.

r/2 -6 =14

r =40
r =34
r =20
r =16

study312 · Answer

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

misssmartiez · Answer

40

misssmartiez · Answer

Do it yourself,

40/2 = what?

misssmartiez · Answer

then - that by 6. 

Actually easy, just think about it :)!

misssmartiez · Answer

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

anonymous · Answer

Ok @MissSmartiez

misssmartiez · Answer

Fire away.