Solving a percent mixture problem

Question

A chef plans to mix 100% vinegar with Italian dressing. The Italian dressing contains 12% vinegar. The chef wants to make 160 millileters of a mixture that contains 23% vinegar. How much vinegar and how much Italian dressing should she use? 

Answer 1

Maddie,

 

This is similar to the last question I helped you with. In this case, you can let x be the number of milliliters (mL) of 12% vinegar dressing. The number of mL of the pure vinegar dressing will then be 160 - x. The equation you form will be

 

160 - x + .12x = .23(160).

 

Can you finish from here?