A coffee is $11 and B coffee is $13 the mixture to sell is $12 find how much should be used to make 312 mixtures for A&B

Question

have to find how much for A & B 

Answer 1

 X - amount of $11 mixed

 

323 - X - amount of $13 mixed.

 

  X ( $11) + ( 312 - X ) 13= 312($) 12

 

 11X + 312* 13 - 13X = 312*12

 

  -2X = -312

 

   X = 156   Amount of $11 mixed

 

   312 - 156 = 156  Amount of $13 mixed.