Could you help me with Algebra please?

Question

Simplify 18 - 2[x + (x - 5)].

I was able to do all of the questions except for this one. How would I solve it, and what's the answer?

Answer 1

18 - 2[x + (x - 5)]

18 - 2[x + 1x -5]

18 - 2[2x-5]

18 - 4x + 10

8- 4x

Answer 2

18 - 2 (x + x -5) -----> solve brackets first

18 - 2 (2x - 5)

18 - 4x + 10 -------> remove brackets and solve

28 - 4x ---->final answer

hope this helps! im 100% sure this is it!!

Answer 3

idk 4x+8 maybe?

Answer 4

18-2[x+(x-5)]=

18-2x-(2(x-5))=

18-2x-2x+10=

18-4x+10=

28-4x

Answer 5

Pretty long but tried to break down all thoughts that should go through your mind.  Keep in mind though, that you don't have to write all these steps after you get used to it you can go directly to the distribution, if you have to show your work.

Do you remember your teacher talking about the different properties, well this one uses the distributive.  Which means you have to distribute x to the rest y and z: Example x(y+z) = xy+xz

Also Brackets [] are the same as parenthesis (), so imagine the problem as 18 - 2 (x+ (x-5) ).

1st Step: Break it down.  2(whateverisinside)

                                        whateverisinside = x + (x + 5)

2nd Step: Another property you should look into is the associative property.  Example: x + (y + z) = (x + y) + z = z + x + y and so on.

So with that said break your problem apart: 18 - 2[whateverisinside]

whateverisinide = x + (x + 5) =  x + x + 5

Now you have something you can work with, so now simplify this small equation and you get whateverisinside = 2x + 5

3rd Step: Therefore we substitute our result of whateverisinside in the original question:

18 - 2[whateverisinside] = 18 - 2[2x - 5]

And remember the [] = () so:

18 - 2[2x - 5] = 18 - 2(2x - 5)

4th Step: Distribute.

Distributing means distributing the number on the outside of the parenthesis to the rest of the numbers by multiplying it to each and every number. Example: x(y+z) = xy + xz

In this case we have a negative 2 to distribute.  Why because we are adding a -2(2x - 5) to 18. Example: 18 + -2(2x - 5)

Also remember negative times a negative equals a positive.

18 - 2(2x - 5) = 18 - 4x + 10

5th Step: Make It Pretty :P

Using the associative property you will make it pretty by putting like terms together.

-4x + 28

Don't get frustrated cuz this is the base of all math. Once you get this it stays with you.  Until u mess with roman letters o.0 then you can prove why that equation is equal to the other without simplifying or graphing lol

Answer 6

do all the addition in the brackets

18 - 2[2x-5]

multiply the -2 with everything in the brackets

18 -4x + 10

do the rest of the addition

28-4x

divide by 4

4(7-x)

Answer 7

18 - 2[x + (x - 5)]

18-2x+(2x-10)

18-4x-10

8-4x

i think that is how you would do it

Answer 8

18 - 2(x + (x - 5))

= 18 - 2x - 2(x - 5)

= 18 - 2x - 2x + 10

= 18 - 4x + 10

= 28 - 4x

KEEP ASKING QUESTIONS........

Answer 9

18-2[x+(x-5)]

18-2x-(-2x+-5)

16x+-3x

13x

....i think

Answer 10

18 - 2 [ 2x -5]

=> 18 - 4x + 10

=> 28 - 4x

this is the answer... well that makes me think, how old are you?

Answer 11

Do your own homework.

But ~DISHA~ Is right.

Answer 12

Not sure if this is right but..

Expression: 18-2 (2x-5)

Result: -4 (x-7)

Answer 13

First simplify the inside parenthesis

18 - 2[ x + x-5]

18-2(2x - 5)

18 - 4x + 10

28 - 4x

Answer 14

You can't solve it because it isn't and equation.  You have to have an equal sign for it to be an equation.

Simplify

18-2(x+(x-5))

18-2(x+x-5)

18-2(2x-5)

18-4x+10

28-4x

Answer 15

1) Distribute: 18- 2x + 2(x-5)

2) and again: 18 - 2x + 2x -10

3) Combine like terms: 8-4x

4) Final product: -4x + 8