2007-04-01 02:53:55 · 6 answers · asked by Diffa W 1 in Science & Mathematics ➔ Mathematics
Do you mean
(7/z) - 3 = -3
or do you mean
7/(z-3) = -3
In the first case, z would be undefined
in the second case
multiply both sides by (z-3) to get
7 = -3 (z-3) {remove brackets}
7 = -3z + 9 {now subtract 9 from both sides}
-2 = -3z
z = 2/3
2007-04-01 02:58:08 · answer #1 · answered by Orinoco 7 · 1⤊ 0⤋
2/3
2007-04-01 10:48:00 · answer #2 · answered by BHARGAV N 1 · 0⤊ 0⤋
7/z-3 = -3
"cross multiplication"
>>> 7 times 1 = 7
>>> z-3 times -3 = -3z + 3
'new equation'
7 = -3z + 3
transfer 3 on right and change its sign
7 - 3 = -3z
4 = -3z
divide both side by -3
4 / -3 = -3z / -3
4 / -3 = z this is the answer<<<<
2007-04-01 10:04:11 · answer #3 · answered by tyroneskee 2 · 0⤊ 0⤋
7/z-3= -3
7= -3(z-3)
7= -3z+9
3z= 9-7
3z=2
z=2/3
2007-04-01 10:11:26 · answer #4 · answered by inquisitive 2 · 0⤊ 0⤋
I assume that's
7/(z-3) = -3
Multiply both sides by z-3
7= -3(z-3)
Multiply 3 through
7= -3z + 9
Subtract 9 from both sides
-2 = -3z
Divide both sides by -3
2/3 = z
2007-04-01 09:58:55 · answer #5 · answered by rebkos 3 · 1⤊ 0⤋
-3z + 9 = 7
-3z = -2
z = 2/3
2007-04-01 09:58:41 · answer #6 · answered by Anonymous · 1⤊ 0⤋