i never learned about brackets and i have no clue how to solve this problem. do brackets act just like the () in this equation? you're supposed to solve for X. and show your work
2[x+5(2x+4) -8] = -(x+9)
2007-09-16 11:38:34 · 10 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
Start with inside bracket:-
2 [ x + 10x + 20 - 8 ] = - 1 ( x + 9 )
2 [ 11 x + 12 ] = - x - 9
22 x + 24 = - x - 9
23 x = - 33
x = - 33 / 23
2007-09-17 01:54:51 · answer #1 · answered by Como 7 · 2⤊ 0⤋
Yes, Brackets are just a different appearance of a Parentheses (i think i spelled it wrong..). Anyway, it works just like a normal parentheses. Bleh.
First, you would want to solve the insides of the brackets FIRST unless you want to risk confusing yourself.
1. [x+5(2x+4)-8]
2. [x+10x+20-8]
3. [11x+12]
Now that you simplified the brackets, the entire equation is
4. 2(11x+12)=-x-9
5. 22x+24=-x-9
6. 23x=-33
7. x= -33/23
Hope this helps.
2007-09-16 18:43:57 · answer #2 · answered by Candyjackr 3 · 0⤊ 0⤋
Brackets are basically parentheses around parentheses.
Brackets are used when a part of the equation needs to be done first, but there are is also a part inside that equation that needs attention first in the parentheses.
Treat what's inside the brackets like a mini-problem, and follow the parentheses respectively.
2007-09-16 18:57:20 · answer #3 · answered by a 1 · 0⤊ 0⤋
k. 2[x+5(2x+4)-8]=-(x+9)=
2[x+10x+20-8]=
2[11x+12]=
22x+24=
-(x+9).
Now move -(x+9) to the left by adding the same thing.
22x+24+(x+9)=
22x+24+x+9=
23x+33=
0(when u moved -(x+9) by adding (x+9) on both sides, 0 was left here.)
Now move+33 on the other side, leaving x isolated.
23x=-33.
x=(-33) divided by 23.
x=-1.434782609
Hope it helped.
2007-09-16 18:56:39 · answer #4 · answered by Harris 6 · 0⤊ 0⤋
yes the brackets are just like (). So youd simplify the equation to 2x+10+20x+40-8=-x +9
2007-09-16 18:42:56 · answer #5 · answered by mi nombre 4 · 0⤊ 0⤋
Work inside out!
2[x+10x+20-8]=-x-9 first step
Brackets are just another type of parenthesis. Do them next and then combine terms.
2007-09-16 18:43:40 · answer #6 · answered by Ed S 4 · 0⤊ 0⤋
2 [ x + 10x + 20 - 8 ] = -x - 9
2[ 11x +12 ] = - x - 9
22x + 24 = -x - 9
23x = - 33
x = - 33/23
2007-09-16 18:47:47 · answer #7 · answered by CPUcate 6 · 0⤊ 0⤋
Just keep distributing from the deepest point.
2[x+10x+20-8]=-x-9
2[11x+12]=-x-9
22x+24=-x-9
23x=-33
x=-33/23
Plug it back in and we find this is the correct answer
2007-09-16 18:45:09 · answer #8 · answered by calc_pi 2 · 0⤊ 0⤋
yea u would do the brackets first, and in the brackets, u would do the parenthesis, im barely doing pre algebra and even i know that
2007-09-16 18:42:59 · answer #9 · answered by ╚»|ƒ|α|м|σ|υ|ѕ|☆! 3 · 0⤊ 1⤋
yes, brackets are the same as parantheses. they just make it look nicer.
2007-09-16 18:42:28 · answer #10 · answered by Anonymous · 1⤊ 0⤋