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Raquel Bentley
Mathematics
15 August, 04:34
1/12x-1/12=1/8x+1/6-1/6x
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Madilyn Crosby
15 August, 04:51
0
Solve for x:
x/12 - 1/12 = x/8 - x/6 + 1/6
x/12 - 1/12 = (x - 1) / 12:
(x - 1) / 12 = x/8 - x/6 + 1/6
Put each term in x/8 - x/6 + 1/6 over the common denominator 24: x/8 - x/6 + 1/6 = (3 x) / 24 - (4 x) / 24 + 4/24:
(x - 1) / 12 = (3 x) / 24 - (4 x) / 24 + 4/24
(3 x) / 24 - (4 x) / 24 + 4/24 = (3 x - 4 x + 4) / 24:
(x - 1) / 12 = (3 x - 4 x + 4) / 24
Grouping like terms, 3 x - 4 x + 4 = 4 + (3 x - 4 x):
(x - 1) / 12 = (4 + (3 x - 4 x)) / 24
3 x - 4 x = - x:
(x - 1) / 12 = (-x + 4) / 24
Multiply both sides by 24:
(24 (x - 1)) / 12 = (24 (4 - x)) / 24
24/12 = (12*2) / 12 = 2:
2 (x - 1) = (24 (4 - x)) / 24
(24 (4 - x)) / 24 = 24/24 * (4 - x) = 4 - x:
2 (x - 1) = 4 - x
Expand out terms of the left hand side:
2 x - 2 = 4 - x
Add x to both sides:
2 x + x - 2 = (x - x) + 4
x - x = 0:
2 x + x - 2 = 4
2 x + x = 3 x:
3 x - 2 = 4
Add 2 to both sides:
3 x + (2 - 2) = 2 + 4
2 - 2 = 0:
3 x = 4 + 2
4 + 2 = 6:
3 x = 6
Divide both sides of 3 x = 6 by 3:
(3 x) / 3 = 6/3
3/3 = 1:
x = 6/3
The gcd of 6 and 3 is 3, so 6/3 = (3*2) / (3*1) = 3/3*2 = 2:
Answer: x = 2
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Myron
15 August, 04:55
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So multiply both sides by 24 (Least Common Multiply of 12, 8, 6)
2x - 24 = 3x + 4 - 4x
2x = 28 - x
3x = 28
x = 9.33
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