Find missing percentage %

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Lillian
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PostLillian on 30th June 2016, 5:28 pm

x % of 250 + 25% of 68 = 67.
Find x.

45
10
20
25
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PostAdmin on 2nd July 2016, 10:16 pm

  x     X 250 +   25 X 68  = 67
100        1       100    1

 5x   +  17    =  67
 2          1

Multiply through by 2
 5x  X 2 +  17  X 2  =  67 X 2
 2              1

5x + 34 =134

Collection of like terms
5x = 134 - 34
5x = 100

Divide both sides by 5
 5x = 100
 5       5
x=20   Answer Very Happy


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Monsterman
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PostMonsterman on 2nd July 2016, 10:23 pm

Paradise wrote:  x     X 250 +   25 X 68  = 67
100        1       100    1

 5x   +  17    =  67
 2          1

Multiply through by 2
 5x  X 2 +  17  X 2  =  67 X 2
 2              1

5x + 34 =134

Collection of like terms
5x = 134 - 34
5x = 100

Divide both sides by 5
 5x = 100
 5       5
x=20   Answer Very Happy

x = 20


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Deyongs
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PostDeyongs on 3rd July 2016, 5:47 am

@Paradise i love that ur solution



 
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