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@billj5 , @Michele_Laino
So you are solving for x. Meaning you need to isolate the x-variable. What is your understanding of this Q so far?
ok start by distributing again
^ Must use the distributive property first. (To get rid of those complex parenthesis!)
You need to use the distributive property on both sides of the equation first. -2(2x+5) and -3(x-1)
yes! If we apply the distributive property of multiplication over addition at both sides, we get: -4x -10 -3 = -3x +3
I'm not sure I can correctly distribute this question
so now what do we do?
Combine like terms.
what is: -10-3=...?
no, it is: -10 -3 = -13
When you're in debt by $10, and get another loan for $3, you're in a total of 13$ of debt.
Now isolate the x from either side… you'll still get the same answer regardless of which side you isolate the x with. (I'd go with the easier side)
IF you do it correctly^^
How would I do that?
You should then get -4x-10=-3x+3 Then get variables and constants on different sides of equation -4x+3x=3+10 -1x = 13 Divide both sides by -1 Your answer should be x = -13 or D
Now what do you do?
try to subtract 7x from both sides, please
No, subtract three from both sides then you can divide. (Remember we CANNOT divide/multiply if there are other constants)
Oh, would you like me to do it the other way? @Michele_Laino
sorry you are right! @Aureyliant
Now what do you get? @FEARLESS_JOCEY
Sorry I ran out of room but we're almost done… We would get: -16 = 7x
Wait… did I do something wrong? The answer isn't in any of the answer choices.
okay, and we divide right?
I'm not to sure how to divide it when it is a negative number.
@Aureyliant I think you messed up somewhere because there is no way that the answer is -2 @FEARLESS_JOCEY look back at my comment and look at how io explained it i got the correct answer
Yes… you did. The answer is x = -16. I checked my work and I didn't see anything incorrect.
@Michele_Laino Do you see where I may have gone wrong?
if you divide -16 by 7 you get -2.28 You went wrong by adding positive 4x to -3x and getting positive 7x when it should have been positive 1x
You're supposed to take the inverse of -4x = +4x. When you take it to the other side of the equation, it must become the opposite sign.
Oh! I see where i went wrong. It was supposed to be -3x + 4x = 1x.
I understand that but -3x did not change signs and it should have become 1x instead of positive 7x You also subtracted -3 from -10 and got 013 and then you subtracted -3 again
I forgot the negative three. I apologize.
I got thise expression: -4x-13=-3x+3 then adding 4x to both sides, we get: -13=x+3
See you guys are forgetting to cross out the three after you have moved it to the opposite side of the equation and you are ending up with an extra 3
I sincerely apologize… I've never made this kind of silly mistake before
Great job catching my mistake though Vet! :)
no worries :) @Aureyliant
No problem! I make those kinds of mistakes every once in a while as well. I always re check my work! @FEARLESS_JOCEY do you understand what the correct answer is
@Aureyliant you have already moved the -3 over to get -13 you do not need to subtract it again to get -16
I understand it.
No… I didn't. The answer is B.
I'm not sure if it is B or D now. Lol, I'm so confused
It's 100% B. I didn't already subtract 3 to get -13… that was an earlier step with another -3. http://prntscr.com/7e7rjb
I think they set it up that way to make it confusing for the student.
@Aureyliant look back at your quation you subracted 3 to get -13, but then you subtracted the 3 again to get -16 but you are not suppossed to because you gave already used it
No, that was when I was combining like terms after distribution.
-3 was already there since the beginning.
There are 2 "-3"s
Look… Let me do the problem again.
OMG you are so right I am so sorry i feel like a moron! @FEARLESS_JOCEY the answer is B
You don't need to work it out again I understand where i messed up
Too late haha :)
Such a long thread. Well that's all for now… TEAMWORK! Hope this helped, Jocey! :)
Tag me if you need any more help.
okay I will. THANKS GUYS!