2007-01-07 03:43:58 · 10 answers · asked by oh purleeeeze 3 in Education & Reference ➔ Homework Help
5(x+3)=2(3x+12)
5x+15 = 6x+24
hence x = 9
in the equation 'x' is called a VARIABLE as its value is unknown
2007-01-07 03:53:26 · answer #1 · answered by Anonymous · 1⤊ 1⤋
X is an unknown u need to remove brakets first: 5x+15=6x+24
then u take the X's to one side and the numbers to another side:6x-5x=15-24 => X = -9
make sure of the answer and replace -9 with every X => 5(-9+3)=2(-27+12) => 5(-6)=2(-15) => -30 = -30
2007-01-07 11:56:46 · answer #2 · answered by RC 1 · 0⤊ 1⤋
To find that, you have to solve.
5(x+3)=2(3x+12)
use the distributive property for the parentheses
5x+15=6x+24
subtract 5x from each side
15=x+24
subtract 24
-9=x
2007-01-07 11:53:02 · answer #3 · answered by mkn 2 · 0⤊ 1⤋
X stand for the variable that needs to be solved so that both sides of the equation are true.
5(x+3) = 2(3x+12)
Distribute the 5 on the left side and the 2 on the right side (just multiply to get rid of the parentheses)
5x+15 = 6x+24
Now get X on its own side and numbers on the rest. So what you do to one side, you have to do to the other side. So subtract 5x and 24 from both sides
5x+15=6x+24
-5x-24=-5x-24
--------------------
-9 = x
so x = -9
2007-01-07 11:48:47 · answer #4 · answered by David W 3 · 1⤊ 1⤋
Well thats exactly the point. What number DO the X's stand for. That is your job. You have to make the equation tell you its own answer, ie solve it. The left side becomes 5x + 15. The right side becomes 6x + 24. From here you get -9=x ( or x = - 9 same thing)
2007-01-07 11:52:09 · answer #5 · answered by Karnak 3 · 0⤊ 1⤋
5(x+3)=2(3x+12)
5x+15=6x+24
-5x -5x
____________
15=x+24
-24 -24
_________
-9 = x
The "x" doesn't stand for anything. it equals negative 9
2007-01-07 11:50:25 · answer #6 · answered by Answerfinder1360 5 · 0⤊ 1⤋
x=15-24=(-9)
sorry for miss understanding
2007-01-07 11:46:55 · answer #7 · answered by FUJA 2 · 0⤊ 2⤋
The x is the symbol for an unknown. You have to find out what the x is equal to.
2007-01-07 11:46:38 · answer #8 · answered by Elvis 7 · 0⤊ 1⤋
X equals negative nine.
2007-01-07 12:46:56 · answer #9 · answered by saphirez 2 · 0⤊ 0⤋
5(x+3)=2(3x+12)
5x+15=6x+24
5x+15-15=6x+24-15
5x=6x+9
5x-6x=6x+9-6x
-1x=9
x=-9
2007-01-07 12:14:58 · answer #10 · answered by Anonymous · 0⤊ 0⤋