2007-05-14 08:07:03 · 8 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
5x -2(4x-3)=6x+9 can be reduced to
5x - 8x + 6 = 6x + 9; combing like terms gives
-3x + 6 = 6x + 9; subtracting 6x from both sides and 6 as well gives
-3x-6x = 9-6
-9x = 3
x=-1/3
Putting back into the start equation, we get
-5/3 - 2 (-4/3 - 9/3) = 6(-1/3) + 9
5/3 -2(-13/3) = -2+9
5/3 + 26/3 = 7
2007-05-14 08:30:10 · answer #1 · answered by Anonymous · 1⤊ 0⤋
5x - 2(4x - 3) = 6x + 9
5x -8x +6 = 6x + 9
-3x +6 = 6x + 9
-3 = 9x
-1/3 = x
2007-05-14 08:36:42 · answer #2 · answered by caitlin0702 2 · 1⤊ 0⤋
5x -2(4x-3)=6x+9
5x -8x + 6 =6x+9
-3x +6 = 6x + 9
6 = 9x + 9
-3 = 9x
x = -1/3
2007-05-14 08:10:24 · answer #3 · answered by ? 7 · 1⤊ 0⤋
5x -8x +6 = 6x +9
- 3x + 6 = 6x + 9
-3x - 6x = 9 -6
-9x = 3
x = 3/-9 = -1/3
2007-05-14 08:16:53 · answer #4 · answered by pioneers 5 · 1⤊ 0⤋
5x -2(4x-3)=6x+9
5x -8x +6 = 6x + 9
-9x = 3
x = -1/3
2007-05-14 08:10:53 · answer #5 · answered by jordanhendon 2 · 1⤊ 0⤋
5x-8x+6=6x+9
-3x+6=6x+9
6-9=6x+3x
9x=-3
x=-3/9 =-1/3
2007-05-14 08:11:21 · answer #6 · answered by iyiogrenci 6 · 1⤊ 0⤋
5x-8x+6=6x+9
5x-8x-6x=9-6
-9x=3
x=3/-9
x=-1/3
2007-05-14 09:51:11 · answer #7 · answered by books_are_heaven 2 · 1⤊ 0⤋
permit a,-a,b,c be those 4 roots. (a>0) then c+d=-5/6, -a^2+cd=-4, -a^2(c+d)=5/2, -a^2*c*d=3 so a=sqrt(3), cd=-a million ==> c=2/3,d=-3/2 so the roots are sqrt(3),-sqrt(3),2/3,-3/2
2017-01-09 20:34:48 · answer #8 · answered by ? 4 · 0⤊ 0⤋