What percent of the second dressing was vinegar?

Question

Jeanie combined .55L of 90% vinegar dressing with .45L of another dressing to to make 1L of dressing with 60% vinegar.

Answer 1

(0.55 L)(90%) + (0.45 L)(x%) = 1 L x 60%

49.5 + 0.45x = 60

0.45x = 10.5

x = 23.3% vinegar