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I need to write and solve the equation.  I don't know how to solve these problems.

 

 Sep 4, 2020
 #1
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She needs 10 liters     of   10%

 

amount of 5%  = x                    amount of acid =   .05x

amount of 40% = (10-x)            amount of acid = .40 (10-x)       

                                                         summed, these = the amount of acid in the final product =  .10 (10)

 

 

.05x         +      .4 (10-x)             =    .10 (10)         solve for 'x' the amount of 5%           then 40% amount =  10-x

 Sep 4, 2020

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