2007-03-11 07:15:26 · 7 answers · asked by skaterslm 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 = - 10/4
x = 2 2/4
x = 2 1/2
x = 2.5
- - - - - - - - -s-
2007-03-11 07:36:21 · answer #1 · answered by SAMUEL D 7 · 0⤊ 0⤋
9x + 7 = 5X -3
to solve for x you need to isolate the x on one side
9x + 7 - 7 = 5x - 3 - 7 (subtract 7 from both sides)
9x = 5x -3-7 (simplify -3 -7)
9x = 5x -10
9x - 5x = 5x - 10 - 5x (subtract 5x from both sides)
4x = -10
(divide by 4 to isolate the x)
x = -10/4
reduce to lowest terms
x = -5/2
2007-03-11 07:20:47 · answer #2 · answered by anicoleslaw 5 · 0⤊ 0⤋
9x - 5x = - 3 - 7
4x = - 10
2x = - 5
x = - 5/2
Check:-
LHS = 9 x (- 5 /2) + 7 = - 45/2 + 14/2 = - 31/2
RHS = 5 x (- 5 /2) - 3 = - 25/2 - 6 /2 = - 31/2
2007-03-11 07:24:06 · answer #3 · answered by Como 7 · 0⤊ 0⤋
9x + 7 = 5x -3
get all xs' together
9x - 5x = -7 -3
4x = -10
x = -5/2
2007-03-11 07:26:56 · answer #4 · answered by priyanka77_bhatia 2 · 0⤊ 0⤋
9x+7=5x-3
then
9x-5x= -3 -7
4x= -10
2x= -5
x= -(5/2) = -2.5
2007-03-11 07:18:40 · answer #5 · answered by --sv-- 2 · 0⤊ 0⤋
4x = -10
x = -10/4 = -(5/2) = -2.5
2007-03-11 07:18:16 · answer #6 · answered by Irmak 7 · 0⤊ 0⤋
-2.5
2007-03-11 07:19:17 · answer #7 · answered by Anonymous · 0⤊ 0⤋