Question 709263
Bought, and later sold x and 2x kg quantities.


Spent:
x*2.20+2x*2.00
={{{6.20x}}}


Sold for Revenue:
(x+2x)2.40
={{{3x(2.40)}}}


In selling, he gained 40.00 pounds profit:
{{{highlight(3x(2.40)-6.20x=40.00)}}}
7.2x-6.2x=40
1.0*x=40
.
{{{highlight(x=1.00)}}} kg. the first tea type
{{{highlight(2x=2.00)}}} kg. the second tea type