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I assume you mean 3x - 8 = 12 - x
if we move the x's to one side and the numbers to the other side:
3x - 8 + x = 12 - x + x
4x - 8 = 12
4x - 8 + 8= 12 +8
4x = 20
4x/4 = 20/4
x = 5
I hope that answers your question but if you would like further information please email me at charris321@wikianswers.com
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What is 3x equals 12?
8-3x-x = 12 8-4x = 12 -4x = 12-8 -4x = 4 x = -1
What is 3x plus 8 equals 12?
3x+8 = 12 3x = 4 x = 4/3
What is the value of x in 6-3x equals 5x-10x plus 12?
6x - 3x = 5x - 10x + 12 6x - 3x - 5x + 10x = 12 8x = 12 8x/8 = 12/8 x = 12/8 = 3/2 x = 1.5
8 plus 7x equals 20 plus 3x what is x?
8+7x = 20+3x 7x-3x = 20-8 4x = 12 x = 3
What is the answer to 4 plus 6x equals 5 plus 3x plus 7?
6x+4=3x+12 => 6x-3x=12-4 => 3x=8 => x=8/3=2.666...
What is 3x equals 12?
8-3x-x = 12 8-4x = 12 -4x = 12-8 -4x = 4 x = -1
What is x in the equation 3x plus 8 equals 20?
3x + 8 = 20 3x = 20 - 8 3x = 12 3x = 12/3 x = 4
What is 8-3x-x equals 12?
8-3x-x = 12 8-4x = 12 -4x = 12-8 -4x = 4 x = -1
What is 3x plus 8 equals 12?
3x+8 = 12 3x = 4 x = 4/3
3x plus 8 equals 20-3x what is x?
3x + x + 8 = 204x + 8 = 204x = 12x = 3
Three times one number minus a second is eight and the sum of the numbers is twelve?
3x-y=8 x+y=12 3x(12-x)=8 3x-12+x=8 4x-12=8 4x=20 x=5 x+y=12 5+y=12 y=7
What is the value of x in 6-3x equals 5x-10x plus 12?
6x - 3x = 5x - 10x + 12 6x - 3x - 5x + 10x = 12 8x = 12 8x/8 = 12/8 x = 12/8 = 3/2 x = 1.5
How do you work out what 3x plus 8 equals 12 is?
3x+8 = 12 Deduct 8 from both sides of the equation: 3x+8-8 = 12-8 3x = 4 Divide both sides of the equation by 3 to find the value of x: x = 4/3 or 1 and 1/3 Substituting the value of x into the original equation: 12 = 12
What is 8(4x- 12) =?
8-3x-x = 12 8-4x = 12 -4x = 12-8 -4x = 4 x = -1
8 plus 7x equals 20 plus 3x what is x?
8+7x = 20+3x 7x-3x = 20-8 4x = 12 x = 3
3x plus 2 x - 8 - 12?
3x + 2x - 8 = 125x - 8 = 125x = 20x = 4
6x-12 equals 3x plus 12?
6x - 12 = 3x + 12 Add twelve to both sides.6x - 12 + 12 = 3x + 12 + 12Simplify.6x = 3x + 24Subtract 3x from both sides.6x - 3x = 3x + 24 - 3xSimplify.3x = 24Divide both sides by 3.x = 8The answer is x = 8.
