Help I'm seriously crying right now because I don't get this? I'm a freshman.?

Question

ok for some reason i'm in honors advanced algebra and this is my second day of school and i'm already crying because i want to sleep and i dont get these problems.

can you explain how to do this one STEP by step

1. 6-[5-(3-x)]

and also this one can you explain to me what i did wrong. its in like the second to last line or something

7-2(3-2x-8)

7-2(-2x-5)

7(4x+10)

28x+70

Answer 1

1.

6-[5-(3-x)]

6-[5-3+x]

6-[2+x]

6-2-x

4-x

2.

In question 2, mistake is on 3rd line.

It should be:

7-2(3-2x-8)

7-2(-2x-5)

Here note that 7 and 2 are not multiplying with each other like you did in the solution you gave. Instead just open the bracket.



7+4x+5

4x+12

Answer 2

6 - [5 - (3 - x)] ← distribute the negative sign across the (3 - x)

6 - [5 - 3 + x] ← now distribute the negative sign across the brackets

6 - 5 + 3 - x ← combine like terms

4 - x ← Final answer

I see it now...

7 - 2*(3 - 2x - 8)

7 - 2*(-2x - 5)

7 + 4x + 10 ← (Here's your error)

4x + 17

We all have our faults and weaknesses.  

At first I didn't see the error, my bad.

These kinds of problems are a lot trickier than folks realize,

because you have to be ever mindful of the polarity of the signs.

That's what the teacher is trying to convey here, so don't worry too much, ok?

Best of luck in your studies,

~ Mitch ~

P.S. - You're welcome to e-mail me if this is not clear.

I'll be happy to help.

Answer 3

6-[5-(3-x)]

6-1[5-1(3-x)]

6-1[5-3+x]

6-5+3-x

4-x

7-2(3-2x-8)

7-2(-2x-5)

7+4x+10

4x+17