2x - 6 - 3x - 15 = 3x -6 -7
-x - 21 = 3x - 13
-8 = 4x
x = -2
2006-08-04 06:58:43
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answer #1
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answered by capu 5
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First, multiply everything out, like so:
2(x-3) = 2x-6, 3(x+5) = 3x+15, 3(x-2) = 3x-6
So now your equation looks like this:
2x-6-3x+15 = 3x-6-7
Now, add all the like terms together:
2x-3x = -x, -6+15 = +9, -6-7 = -13, leave the 3x on the right alone
This is what you end up with:
-x + 9 = 3x - 13
Now, add 13 to both sides to get rid of the -13 on the right. You'll end up with this:
-x + 20 = 3x
Now add x to each side to get rid of the -x on the left. This is what you end up with:
20 = 4x
Divide each side by 4, and you get x = 5
2006-08-04 14:00:59
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answer #2
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answered by sarge927 7
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Each item in the parenthesis should be multiplied by the number before it.
so 2 times x is 2x, 2 times -3 is -6, -3 times x is -3x, -3 times 5 is -15. On that side we get 2x-6-3x-15
On the other side we will get 3 times x is 3x and 3 times -2 is -6. On that side we not have 3x-6-7
Now we have
2x-6-3x-15=3x-6-7
Add the x's and the numbers one each side to get:
-x-21=3x-13
Take the x from the left and add it to the right, then take the 13 from the right and add it to the left
-8=4x
Then we divide -8 by 4 to get rid of it on the right
-2=x
Hope that helps!
2006-08-04 13:59:08
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answer #3
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answered by Kira 2
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First of all you need to distribute the 2, -3 and 3 into the parenthesis giving:
2x-6-3x-15 = 3x-6-7
Then group together the like terms (i.e. terms with x or no x) and then just add them together and solve until you have x= a number.
2006-08-04 13:56:08
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answer #4
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answered by reiwo023-9085j 2
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2(x-3) - 3(x+5) = 3(x-2)-7
Expanding, and taking care of the minus sign, you get
2x - 6 -3x - 15 = 3x - 6 - 7
Bring the x terms to the left hand side and non-x terms to the right hand side, you get
-4x = 8
Solving for x, you get x = -2
You can verify the answer by substituing x=-2 into the orginal equation to see whether the value from left hand side of the orginal equation equals the value from the right hand side of the equation.
2006-08-04 14:02:00
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answer #5
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answered by Anonymous
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start by simplifying =
2x-6 - 3x - 15 = 3x - 6 - 7
continue with simplifying
2x - 6 -3x - 15 becomes, -x -21
3x - 6 - 7 becomes 3x - 13
now you have: -x - 21 = 3x - 13
now get the both x's on the same side. (subtract 3x)
-4x - 21 = - 13
now get 21 to the other side by adding 21 to the side it is on
-4x = 8
now divide to get x
x = -2
2006-08-04 13:58:47
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answer #6
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answered by Young_Curious_One 3
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2x-6-3x-15=3x-6-7 transposing -4x=8 therefore x=-2
check 2(-2)-6-3(-2)-15=-19 and 3(-2)-6-7=-19 so checks
2006-08-04 13:59:19
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answer #7
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answered by raj 7
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2(x-3)-3(x+5)=3(x-2)-7
2x-6-3x-15=3x-6-7
-x-21=3x-13
-21=4x-13
-8=4x
-2=x
2006-08-04 13:58:44
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answer #8
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answered by sarisweetie 3
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I suck at math but I can spell. Algebra. Good luck.
2006-08-04 13:54:35
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answer #9
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answered by Anonymous
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