Question 705187
(y*0.2+x*0.05)/10=0.11
x+y=10

Where x cc of 5% solution, y cc of 20% solution.


Transform the rational equation to 20y+5x=10*11, divide by 5,
4y+x=22


Now you have the system
x+4y=22
x+y=10


Subtract second equation from first equation and obtain 3y=12, then y=4.
Since {{{highlight(y=4)}}}, {{{highlight(x=6)}}}.