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Maximo Goodwin
Mathematics
31 August, 09:51
What is the missing value in the equation
2 3/12+3/? = 2 5/8
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Marco Bird
31 August, 10:17
0
2 3/12 + 3/x = 2 5/8
simplify to
9x+12/4x = 21/8
Cross multiply
(9x+12) / (4x) = 21/8
(9x+12) * (8) = 21*4x
72x+96 = 84x
Subtract 84 x from both side
72x+96 - 84x = 84x - 84x
-12x+96 = 0
Subtract 96 from both sides
-12x+96-96 = 0-96
-12x = - 96
Divide both sides by 12
-12x/-12 = - 96/-12
x = 8
The missing value is 8
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