im a first year student
2007-03-07 00:05:47 · 14 answers · asked by eva j 1 in Science & Mathematics ➔ Mathematics
x = 12 - 3x
x + 3x = 12 - 3x + 3x
4x = 12
4x/4 = 12/4
x = 12/4
x = 3
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2007-03-07 00:14:54 · answer #1 · answered by SAMUEL D 7 · 0⤊ 0⤋
X = 12 - 3x
Step 1
X + 3X = 12 (U know why i put X+3X )
Step 2
4X = 12
Step 3
x = 12/4 = 3
so X = 3
got it
2007-03-07 01:29:55 · answer #2 · answered by lakshmanakumar k 1 · 0⤊ 0⤋
x=12-3x
move th 3xto the left side
x+3x=12
4x=12
x=3
2007-03-07 00:14:21 · answer #3 · answered by Ivy 1 · 0⤊ 0⤋
x=12-3x is another way of saying x+3x=12
=4x=12
=x=3
2007-03-07 01:18:46 · answer #4 · answered by james 2 · 0⤊ 0⤋
x=12 -3x
when -3x will go to the other side of the equality its sign will be changed
3x(1x)=12
= 4x=12
now when 4 will go to the other side of the equality its sign wil be changed
i mean it is being multiplied with x and after moving from one side to an other it will be divided
so
x=12divided by4
so x=3 and thats the simplified form of x=12 -3x.
2007-03-07 00:18:37 · answer #5 · answered by Anonymous · 0⤊ 0⤋
x = 12 - 3x (transpose and change sign)
3x + x = 12
4x = 12 (divide both sides by 4 to get rid of x's coefficient)
4x/4 = 12/4
x = 3
2007-03-07 01:55:14 · answer #6 · answered by terrorblade 3 · 0⤊ 0⤋
here given is
x=12-3x
=>x+3x =12
=>4x =12
=>x= 12/4 =3.
2007-03-07 00:14:29 · answer #7 · answered by Saswat 2 · 0⤊ 0⤋
First, add 3x to both sides.
x + 3x = 12 - 3x + 3x
4x = 12
Then divide by 4 to get:
x = 3
2007-03-07 00:09:28 · answer #8 · answered by Bramblyspam 7 · 0⤊ 0⤋
Add 3x to both sides of the equation:
4x=12
Divide by 4:
x=3
2007-03-07 00:09:06 · answer #9 · answered by pjjuster 2 · 0⤊ 0⤋
x = 12 - 3x
x + (3x)= 12 - 3x +(3x)
4x = 12
x = 3 ( divide by 4)
2007-03-07 00:39:31 · answer #10 · answered by Anonymous · 0⤊ 0⤋