SOLUTION: 2 ml of an acid solution was mixed with 3 ml of a 85% acid solution to make a 79% acid solution. Find the percent concentration of the first solution.

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Question 989096: 2 ml of an acid solution was mixed with 3 ml of a 85% acid solution to make a 79% acid solution. Find the percent concentration of the first solution.
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Let +x+ = % concentration of the 1st solution
+2x+ = ml of acid in 1st solution
+.85%2A3+ = ml of acid in 2nd solution
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+%28+2x+%2B+.85%2A3+%29+%2F+%28+2+%2B+3+%29+=+.79+
+2x+%2B+.85%2A3+=+.79%2A5+
+2x+=+.79%2A5+-+.85%2A3+
Solve for +x+
( I misplaced my calculator )