2007-10-01 23:52:05 · 9 answers · asked by SOSme 1 in Science & Mathematics ➔ Mathematics
4 - x + 5 = 3x - 12 + 2x
21 = 6x
x = 3½
2007-10-02 00:50:38 · answer #1 · answered by Como 7 · 3⤊ 0⤋
4-(x-5)=3(x-4)+2x
4-x+5=3x-12+2x (distributive property twice applied)
-x+9=5x-12 (combine like terms on each side)
21 = 6x (add 12 and x to each side)
x = 21/6 = 7/2 or 3.5 (divide both sides by 6, then reduce)
P.S. Do try your best to learn how to do this yourself! =)
2007-10-02 00:07:41 · answer #2 · answered by Skepticat 6 · 0⤊ 0⤋
Expands the brackets:
4 - x + 5 = 3x - 12 + 2x
Collect like terms:
9 - x = 5x - 12
6x = 21
x = 3.5
2007-10-01 23:59:32 · answer #3 · answered by รզlεսռց ☆ 6 · 1⤊ 0⤋
4-(x-5) = 3(x-4)+2x
4-x+5 = 3x -12+2x
9-x = 5x -12
-6x = -21
x = 21/6 = 7/2
2007-10-01 23:59:49 · answer #4 · answered by remowlms 7 · 1⤊ 1⤋
4-(x-5)=3(x-4)+2x
4-x+5 = 3x-12+2x
4+5+12=3x+2x+x
21=6x
x= 3.5
2007-10-01 23:58:13 · answer #5 · answered by libraboy28 2 · 2⤊ 1⤋
-4x+20=3x-12+2x, or -4x -3x -2x= -12(+)-20= -9x=-22, or 9x=22 and x=2 4/22, or 2 2/11[ans]
2007-10-01 23:59:19 · answer #6 · answered by WC 7 · 0⤊ 0⤋
9 - x = 5x - 12
6x = 21
x = 21/6 = 3.5
2007-10-02 00:00:50 · answer #7 · answered by Gyan 2 · 1⤊ 0⤋
4-(x-5)=3(x-4)+2x
4-x+5=3x-12+2x
9-x=5x-12
21=6x,or
x=21/6=7/2
x=3.5
2007-10-01 23:59:31 · answer #8 · answered by dream_to_death 2 · 1⤊ 0⤋
4-x+5=3x-12+2x
9-x=5x-12
5x+x=-12-9
6x=-21
x=21\6
x=7\2
2007-10-02 00:10:29 · answer #9 · answered by Shikago 1 · 0⤊ 0⤋