1.5x + 1 = 21
2.2x = 5x -12
3.4 - (2x - 9)= -19
4.-3(2x + 1) = 2(x - 2)
5.-6x + 3 - 2x = 3 - 8x
2007-02-19 04:02:17 · 4 answers · asked by kieron b 1 in Science & Mathematics ➔ Mathematics
5x+1=21
5x=20
x=4
2x=5x-12
-3x=-12
x=4
4-2x+9=-19
-2x=-32
x=16
-6x-3=2x-4
-8x=-1
x=1/8
-8x+3=3-8x
0x=0
value of x is any real number
2007-02-19 05:14:59 · answer #1 · answered by cfwolfs 3 · 0⤊ 0⤋
1)
5x+1=21
5x = 20
x = 4
2)
2x=5x-12
12 = 5x-2x
3x = 12
x = 4
3)
4-(2x-9) = -19
4-2x+9 = -19
2x = 4+9+19
2x = 32
x =16
4)
-3(2x+1)=2(x-2)
-6x-3 = 2x-4
6x+2x = 4-3
8x = 1
x = 1/8
5)
-6x+3-2x=3-8x
8x-6x-2x = 3-3
0x = 0
x =0/0
x indetermine (x can be any number)
2007-02-19 04:06:21 · answer #2 · answered by seah 7 · 0⤊ 0⤋
1. 4
2. 4
3. 16
4.
-6x-3 = 2x-4
8x = 1
x = 1/8
5. x = all real numbers
2007-02-19 04:11:19 · answer #3 · answered by David 3 · 0⤊ 0⤋
1.x=4
and the others do them by yourself
2007-02-19 04:10:58 · answer #4 · answered by Msz.C0l0MBiAN MAMi 1 · 0⤊ 0⤋