5x - 8 = 2x + 1
x = ?
x = -1
x = 6
x = 3
x = -7/3
2006-11-15 04:28:07 · 13 answers · asked by martha l 1 in Science & Mathematics ➔ Mathematics
5x - 8 = 2x + 1
add 8 to both sides
5x - 8 + 8 = 2x + 1 + 8
5x = 2x + 9
subtract 2x from both sides
5x - 2x = 2x + 9 - 2x
3x = 9
divide both sides by 3
1/3 * 3x = 1/3 * 9
x = 3
2006-11-15 04:39:30 · answer #1 · answered by Math Helper 3 · 0⤊ 0⤋
X=3
2006-11-15 04:40:38 · answer #2 · answered by Anonymous · 0⤊ 1⤋
x=3
2006-11-15 04:36:18 · answer #3 · answered by pinai b 2 · 0⤊ 0⤋
x=3
2006-11-15 04:30:55 · answer #4 · answered by Sam 3 · 0⤊ 0⤋
5x - 8 = 2x + 1
5x - 8 - 2x = 2x + 1 - 2x
3x - 8 = 1
3x - 8 + 8 = 1 + 8
3x = 9
3x/3 = 9/3
x = 3
The answer is x = 3
Insert the x value into the equation
- - - - - - - - - - - - - - - - - - - - - - -
Check
5x - 8 = 2x + 1
5(3) - 8 = 2(3) + 1
15 - 8 = 6 + 1
7 = 7
The solution set is { 3 }
- - - - - -s-
2006-11-15 04:39:59 · answer #5 · answered by SAMUEL D 7 · 0⤊ 0⤋
5x - 8 = 2x + 1 add 8 to each side
5x=2x+9 subtract 2x from each side
3x=9 divide by 3
x=3
2006-11-15 04:36:56 · answer #6 · answered by yupchagee 7 · 0⤊ 0⤋
Subtract to get the X terms on the same side of the =.
3x-8=1
Now add 8 to both sides
3x=9
Divide by 3
x=3
2006-11-15 04:33:37 · answer #7 · answered by nmtgirl 5 · 0⤊ 0⤋
5x-8 = 2x+1
5x = 2x+9
3x = 9
x = 3
2006-11-15 04:33:10 · answer #8 · answered by drjas 1 · 0⤊ 0⤋
One step at a time:
5x - 8 = 2x + 1
3x - 8 = 1
3x = 9
x = 3
And do your own homework next time!
2006-11-15 04:31:53 · answer #9 · answered by Jerichoholic 2 · 0⤊ 0⤋
5x-8=2x+1
5x-2x=1+8
3x=9
x=9/3
x=3
2006-11-15 05:28:51 · answer #10 · answered by Anonymous · 0⤊ 0⤋