2006-12-08 06:50:20 · 19 answers · asked by momoftwins1986 1 in Science & Mathematics ➔ Mathematics
9x + 7 = 5x - 3
9x + 7 - 5x = 5x - 3 - 5x
4x + 7 = - 3
4x + 7 - 7 = - 3 - 7
4x = - 10
4x/4 = - 10/4
x = - 2 2/4
x = - 2 1/2
x = - 2.5
The answer is x = - 2.5
Insert the x value into the equation
- - - - - - - - - - - - - - - - - - - - - -
Check
9x + 7 = 5x - 3
9(-2.5) + 7 = 5(-2.5) - 3
- 22.5 + 7 = - 12.5 - 3
- 15.5 = - 15.5
- - - - - - -s-
2006-12-08 07:15:58 · answer #1 · answered by SAMUEL D 7 · 0⤊ 0⤋
9x + 7 = 5X -3 to remedy for x you want to isolate the x on one section 9x + 7 - 7 = 5x - 3 - 7 (subtract 7 from both section) 9x = 5x -3-7 (simplify -3 -7) 9x = 5x -10 9x - 5x = 5x - 10 - 5x (subtract 5x from both section) 4x = -10 (divide with techniques from 4 to isolate the x) x = -10/4 cut back to lowest words x = -5/2
2016-11-30 08:00:01 · answer #2 · answered by ? 4 · 0⤊ 0⤋
9x + 7 = 5x - 3 =
4x + 7 = -3 =
4x + 10 = 0 =
4x = 10
therefore x = 10/4 or 2.5
2006-12-08 06:54:40 · answer #3 · answered by gbiaki 2 · 1⤊ 0⤋
9x+7=5x-3
9x+10 = 5x
9x - 5x = -10
4x = -10
x = -10/4 = -5/2 = - 2 1/2
2006-12-08 06:58:28 · answer #4 · answered by Brain 2 · 0⤊ 0⤋
9x + 7= 5x-3
-5x -5x
4x+7=-3
-7 -7
4x= -10
/4 /4
x= -2 1/2
2006-12-08 06:55:35 · answer #5 · answered by Anonymous · 1⤊ 0⤋
9x + 7 = 5x - 3 (Subtract 5x and 7 from both sides)
4x = -10 (Divide both sides by 4)
x = -10/4 or -2.5
Check:
9(-2.5) + 7 = 5(-2.5) - 3
-22.5 + 7 = -12.5 - 3
-15.5 = -15.5
QED
2006-12-08 07:28:13 · answer #6 · answered by CSUFGrad2006 5 · 0⤊ 0⤋
9x + 7 = 5x - 3
-9x+9x+7=5x-3-9x
7= -3-4x
+3+7= -3-4x+3
10 = -4x
10/4= -4x/4
x = 10/4 or 2.5
2006-12-08 07:02:44 · answer #7 · answered by sushimaven 4 · 0⤊ 1⤋
-10/4 or -2 1/2
2006-12-08 06:56:18 · answer #8 · answered by RENEE R 1 · 0⤊ 0⤋
9x+7=5x+3
4x=-4
x=-1
2006-12-08 07:41:03 · answer #9 · answered by Sohil V 1 · 0⤊ 0⤋
9x = 5x + -3 + -7
9x = 5x + -10
9x - 5x = -10
4x = -10
x = -10 / 4
x = -5 / 2
2006-12-08 06:54:30 · answer #10 · answered by trigam41 4 · 0⤊ 0⤋