3(x-4)=2x+7-3x
thank you Im really lost on this problem...
2007-09-05 09:05:31 · 3 answers · asked by kawaii_dumpling 1 in Science & Mathematics ➔ Mathematics
3(x - 4) = 2x + 7 - 3x
The distributive property on the leff side of the equation
3x - 12 = 2x + 7 - 3x
Collect like terms on the right side of the equation
3x - 12 = - x + 7
transpose x
3x - 12 + x = - x + 7 + x
Collect like terms
4x - 12 = 7
Transpose 12
4x- 12 + 12 = 7 + 12
4x = 19
Divide both sides of the equation by 4
4x / 4 = 19 / 4
x = 19/4
x = 4 3/4
x = 4.75
- - - - - - -s-
2007-09-05 09:26:57 · answer #1 · answered by SAMUEL D 7 · 0⤊ 0⤋
3(x - 4) = 2x + 7 - 3x
3x - 12 = 2x + 7 - 3x
2x = - 5
x = - 2.5 or - 2 1/2
2007-09-09 09:21:31 · answer #2 · answered by Jun Agruda 7 · 3⤊ 0⤋
use the distributive property..so:
3x-12 = 2x+7-3x
then put all x's on one side by subtracting 2x and adding 3x on both sides, so:
4x-12=7
then put the 12 on the other side by adding 12 on both sides:
4x-12+12=7+12
4x=19
divide both siddes by 4, so:
x=19/4
is that ok??
hope so..
2007-09-05 16:16:58 · answer #3 · answered by desigurl824 2 · 0⤊ 0⤋