Question

Tea A and tea B are mixed in the ratio x:y by weight. A costs $80/kg and B costs $100/kg. If the cost of A is increased by 10% and that of B is decreased by 12%, the cost of the mixture per kg remains unchanged. Find x:y.

Answer 1

new cost of a = 88 and new cost of b = 88
80x+100y=88x+88y
use this equation

Answer 2

3:2
thx