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1.) 55x- 3 (9x+ 12) =-64
2.) 9x -5 (x-12)=30
3.) -6x+3(4x-1)=9
4.) 2 ways to answer: 1/8x-5=3
5.) 2 ways to answer: -4x-2=4
2006-10-04 12:08:39 · 16 answers · asked by hotchikdancer 2 in Science & Mathematics ➔ Mathematics
you're quite 'thick' if you can't answer this but here goes:
1.) 55x - 27x - 36 = - 64
28x - 36 = - 64
28x = - 64 + 36
28x = - 28
x = - 1
2.) 9x - 5x + 60 = 30
4x + 60 = 30
4x = 30 - 60
4x = - 30
x = -7.5
3.) - 6x + 12x - 3 = 9
6x = 9 + 3
6x = 12
x = 2
4.) 1/8x - 5 = 3
1/8x = 3 + 5
1/8x = 8
x = 64
5.) - 4x = 4 + 2
- 4x = 6
- x = 1.5
x = - 1.5
2006-10-04 12:26:41 · answer #1 · answered by inderjot09 1 · 1⤊ 0⤋
1) 55x-3(9x+12)=-64
55x-27x-36=-64
28x=-64+36
28x=-28
x=-1
2) 9x-5(x-12)=30
9x-5x+60=30
4x=30-60
4x=-30
x=-30/4
x=-15/2
3) -6x+3(4x-1)=9
-6x+12x-3=9
-6x=9+3
-6x=12
x=-2
4) 1/8x-5=3
8(1/8x-5=3)
x-40=24
x=24+40
x=64
OR
1/8x-5=3
1/8x=3+5
1/8x=8
1/8x divided by 1/8= 8 divided 1/8
1/8x times 8/1= 8/1 times 8/1
x=64
5) -4x-2=4
-4x=4+2
-4x=6
x=-6/4
x=-3/2
OR
-4x-2=4
-4x-2-4=0
-4x-6=0
-2(2x+3)=0
2x+3=0
2x=-3
x=-3/2
2006-10-04 12:39:54 · answer #2 · answered by Melanie G 1 · 0⤊ 0⤋
1. 55x-27x-36= -64
28x-36= -64
28x= -28
x = -1
2. 9x - 5x +60 = 30
4x + 60 = 30
4x = -30
x = -7.5
3. -6x + 12x -3 = 9
6x - 3 = 9
6x = 12
x = 2
2006-10-04 12:30:36 · answer #3 · answered by shoutingchimp 3 · 0⤊ 0⤋
55x-3(9x+12)=-64 [distribute]
55x-18x-36=-64 [combine x's and add 36 to each side]
37x=-28 [divide by 37]
x= -28/37 [ / is divide as well as fracion]
9x-5(x-12)=30 [distribute]
9x-5x+60=30 [ combine x's -60 from each side]
4x=-30 [divide each side by 4]
x= -30/4
-6x+3(4x-1)=9 [distribute]
-6x+12x-3=9 [combine x's and + 3 to both sides]
6x=12 [divide each side by 6]
x=2
4.) 1/8x-5=3 [multiply both sides by 8]
x-40=24 [add 40 to both sides]
x=64
or
1/8x-5=3 [add 5 to both sides ]
1/8x=8 [multiply by 8 both sides]
x=64
5.) -4x-2=4 [+2 both sides]
-4x=6 [ divide by -4]
x= -3/2 [ or - 1 and 1/2]
or
-4x-2=4 [add 4x to both sides]
-2=4x+4 [minus 4 from both sides]
-6=4x [ divide both sides by 4]
-3/2=x [ Flip equation if u want]
x=-3/2
Sorry it took so long hard to type all this out. I'm in pre-calc...so its prolly all correct... but its late so you might wanna double check.
2006-10-04 12:21:22 · answer #4 · answered by el_huevo_de_la_noche 2 · 1⤊ 1⤋
Here is #2, use it as an example for 1 & 3
9x - 5(x-12) = 30
9x - 5x + 60 = 30
4x = 30 -60
4x = -30
x = -30/4
x = -7.5
Substitute to verify
Hope it helps
2006-10-04 12:22:26 · answer #5 · answered by martinezld22 1 · 1⤊ 0⤋
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2016-12-26 09:54:32 · answer #6 · answered by devoss 3 · 0⤊ 0⤋
1) 55x-3(9x+12)=-64
55x+-27x+36=-64
28x+-36=-64
28x+=-28
x= -1
now try the rest on your owns, if you still dont get it, send me an emaill predators82003@yahoo.com
:)
2006-10-04 12:12:55 · answer #7 · answered by predators82003 1 · 0⤊ 0⤋
use pemdas. its will help u on the first few questions. well numbers 1-3. for numbers 4 and 5change the variable.
2006-10-04 12:10:54 · answer #8 · answered by Anonymous · 0⤊ 0⤋
Ahhhhhhhhhhhhhh. NO. my teacher gave me a break, and i have no hw. So plz dont make me answer.
2006-10-04 12:09:53 · answer #9 · answered by Anonymous · 1⤊ 0⤋
for one two and three use distributive property and then combine like terms, it should be easy from ther
2006-10-04 12:13:51 · answer #10 · answered by Anonymous · 0⤊ 1⤋