2007-06-22 05:43:11 · 12 answers · asked by LASHANDA F 1 in Science & Mathematics ➔ Mathematics
3x-5(3x-7)=2(x+9)+45
3x - 15x + 35 = 2x + 18 + 45
-12x + 35 = 2x + 63
35 - 63 = 2x + 12x
-28 = 14x
x = -2
2007-06-22 05:47:03 · answer #1 · answered by MamaMia © 7 · 0⤊ 0⤋
Answer:
3x - 5(3x - 7) = 2(x + 9) + 45
3x - 15x + 35 = 2x + 18 + 45
x3 - 15x - 2x = 18 + 45 - 35
-14x = 28
x = 28/(-14)
x = -2
Proof (substitute x by -2):
3(-2) - 5(3[-2] - 7) = 2(-2 + 9) + 45
- 6 - 5(- 6 - 7) = - 4 - 18 + 45
- 6 + 30 + 35 = 4 - 18 + 45
59 = 59
2007-06-26 02:36:42 · answer #2 · answered by Jun Agruda 7 · 2⤊ 0⤋
It's been a long time but maybe x=
3x-15x + 35 =2x + 18 + 45
-12x + 35 = 2x + 63
-14x = 28
divide by -14
x= -2
2007-06-22 12:52:59 · answer #3 · answered by ga_peach64131 3 · 0⤊ 0⤋
3x-5(3x-7) = 2(x+9)+45
3x-15x+35 = 2x+18+45
-12x+35 = 2x+63
-14x+35 = 63
-14x = 28
x = -2
2007-06-22 12:57:27 · answer #4 · answered by devinity04230 3 · 0⤊ 0⤋
3x-5(3x-7)=2(x+9)+45
3x - 15x + 35 = 2x + 18 + 45
-12x + 35 = 2x + 63
35 - 63 = 2x + 12x
-28 = 14x
x = -2
2007-06-26 11:50:04 · answer #5 · answered by ♫●GARV●♫ 6 · 0⤊ 0⤋
Are you factorising this?
3x - 15x - 35 = 2x + 18 + 45
0 = 14x + 98
x = - 7
2007-06-22 12:48:27 · answer #6 · answered by Anonymous · 0⤊ 1⤋
3x - 15x + 35 = 2x + 18 + 45
- 14x = 28
x = - 2
2007-06-24 05:24:08 · answer #7 · answered by Como 7 · 0⤊ 0⤋
3x -15x + 35 = 2x + 18 + 45
-12x -2x = 63 - 35
-14x = 28
x = -2
2007-06-22 12:46:40 · answer #8 · answered by Buttons 3 · 0⤊ 0⤋
Shouldn't it be 3x-15x+35=2x+18+45? Figure it out from here...this is homework, right?
2007-06-22 14:02:24 · answer #9 · answered by ? 6 · 0⤊ 0⤋
Simplifying it, we get,
-12x+35 = 2x +63
-14x = 28
Therefore x = -2 which is the answer.
2007-06-22 12:54:08 · answer #10 · answered by Syed S 2 · 0⤊ 0⤋