Help with solving: 7k/8-3/4-5k/16=3/8
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Help with solving: 7k/8-3/4-5k/16=3/8

[From: ] [author: ] [Date: 11-04-24] [Hit: ]
..72k - 96= 48...lcm of 4,......
I have never been very good with fractions, nor variables, so this equation is proper Hell for me.
Seventh grade math should not be this way.

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First try to keep all terms containing variables on left hand side and push all the numbers to the right hand sides as shown below

7k/8-5k/16 = 3/8+3/4

7k(2)/8(2) -5k/16 = 3/8 + 3(2)/4(2) --------> Multiply and divide the numbers that makes the denominators same

14k/16 - 5k/16 = 3/8 + 6/8

(14k-5k)/16 = (3+6)/8

9k/16 = 9/8
cross multiply

9k * 8 = 9 * 16

Cancel 9 on both sides and 8 * 2 =16

Therefore K = 2

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7k/8-3/4-5k/16 = 3/8
(14k - 12 - 5k)/16 = 3/8....take a common denominator
(9k - 12)/16 = 3/8...simplify
72k - 96 = 48...cross multiplication
72k = 144
k = 2

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JUST MULTIPLY BOTH SIDES BY 16

14k - 12 - 5k = 6

9k = 18
k = 2 ANSWER

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14k/16 - 5k/16 = 3/8 + 3/4
9k/16 = 9/8
k = 16/8
k = 2

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7k/8-3/4-5k/16=3/8

14k-12--5k=6

9k=18

k=2

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k = 2
lcm of 4,8 & 16 is 16

lhs = (9k - 12) / 16
equate lhs and rhs
9k = 18
hence k = 2
1
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