Answers

2014-05-28T16:06:38+08:00
2(10%) + x(100%) = (2+x)(25%)

Multiply both sides by 100 to cancel out the % sign
2(10) + x(100) = (2+x)(25)
20 + 100x = 50 + 25x

Combine liek terms
75x = 30
x = 2/5 liters

Hope this helps :)
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