I keep coming up with two different answers, -2.5 and -4. Neither makes he equation true.
2007-09-08 12:40:29 · 20 answers · asked by shroomdaisy359 1 in Science & Mathematics ➔ Mathematics
assuming you want to solve for x then...
9x=5x-3-7
9x-5x=-3-7
4x=-10
x=-10/4
x=-5/2
x=-2.5
to prove...
4 (-2.5) = -10
2007-09-08 12:46:43 · answer #1 · answered by KitKat 3 · 0⤊ 0⤋
Your answer of -2.5 is correct
9x+7 =5x-3
=> 4x=-10
=> x=-2.5
Check
9x+7 = 9*(-2.5) + 7 = -15.5
5x-3 = 5*(-2.5) -3 = -15.5
2007-09-08 19:44:54 · answer #2 · answered by piscesgirl 3 · 0⤊ 0⤋
The answer is -2.5.
2007-09-08 19:48:07 · answer #3 · answered by Anonymous · 0⤊ 0⤋
-2.5 is correct and makes the equation true.
9(-2.5) +7=-15.5 and 5(-2.5) -3=-15.5.
2007-09-08 19:52:29 · answer #4 · answered by math whiz 3 · 0⤊ 0⤋
9x+10 = 5x
4x+10 = 0
4x=-10
x = -2.5
(9*-2.5) +7 = (5*-2.5) -3
-15.5 = -15.5
2007-09-08 19:48:08 · answer #5 · answered by cell-hell 3 · 0⤊ 0⤋
9x+7=5x-3
=4x-10
= x= -10/4
= -2.5
Justify
9 (-2.5) + 7=-15.5 (-22.5-7)
5 (-2.5) - 3 =15.5 (-12.5-3)
2007-09-08 19:47:40 · answer #6 · answered by JMCG 3 · 0⤊ 0⤋
9x + 7 = 5x -3
9x = 5x - 10
4x = -10
x= -10/4 or -2.5
2007-09-08 19:45:02 · answer #7 · answered by Julie B 1 · 0⤊ 0⤋
42
2007-09-08 19:43:09 · answer #8 · answered by denimcap 4 · 0⤊ 0⤋
x = -2.5
2007-09-08 19:42:57 · answer #9 · answered by hallock36 3 · 0⤊ 0⤋
x = -2.5
2007-09-12 10:24:05 · answer #10 · answered by Siddhartha Basu 4 · 0⤊ 0⤋