2007-03-11 12:06:52 · 11 answers · asked by HELP w/ Math! 1 in Science & Mathematics ➔ Mathematics
-3x=-15
3x=15
x=15/3
x=5
2007-03-11 12:09:32 · answer #1 · answered by The Yeti 3 · 0⤊ 1⤋
X=5
2007-03-11 19:14:47 · answer #2 · answered by John S 2 · 0⤊ 0⤋
You take the 45 and subtract it from the 30 and get -15 and 3x will go into -15, -5 times
45 - 3x=30
3x=30 - 45
3x= -15
x = -5
If the 45 had been a - 45 you would have added it to the 30
2007-03-11 19:19:31 · answer #3 · answered by oklongbunch@sbcglobal.net 1 · 0⤊ 0⤋
The answer is 5.
To work the problem:
Subtract 45 from 30.
-3x= -15
Divide both sides by -3.
x=5
2007-03-11 19:13:17 · answer #4 · answered by korniegirl1 2 · 0⤊ 0⤋
Ok, let's see,
45 - 3x = 30
Adding 3x to both sides of the equation, you get
45 = 30 + 3x
subtracting 30 from both sides of the equation,
15 = 3x
Dividing by 3,
x = 15/3 or 5 which is the answer,
so,
45 - 3(5) = 45 - 15 = 30
Good luck
2007-03-11 19:11:32 · answer #5 · answered by alrivera_1 4 · 0⤊ 0⤋
x=5 this is how you figure it out. 45-3x=30. you have to find out what the is the number to get 30 from 45. 45-15=30. Now look at the 3. 3x5=15. that's how you get the answer
2007-03-11 19:32:26 · answer #6 · answered by justine w 2 · 0⤊ 0⤋
45 - 30 = 3x
3x = 15
x = 5
2007-03-11 19:12:31 · answer #7 · answered by Como 7 · 0⤊ 0⤋
45 - 3x = 30
3x = 45 - 30
3x = 15
x = 5
2007-03-11 19:12:39 · answer #8 · answered by Lilly26 3 · 0⤊ 0⤋
3x=15
x=5
The answer is x=5
2007-03-11 19:10:57 · answer #9 · answered by smartdude474 2 · 0⤊ 0⤋
5; plug 5 into x and see what you get
2007-03-11 19:10:29 · answer #10 · answered by AKAdemiks 3 · 0⤊ 0⤋