A nurse mixes cc of a saline solution with a saline solution to produce a saline solution. How much of the solution should he use?

Question

A nurse mixes 60

 cc of a 70%

 saline solution with a 30%

 saline solution to produce a 45%

 saline solution. How much of the 30%

 solution should he use?

Answer 1

0.70(60) + 0.30x = 0.45(60 + x)

Can you solve for x and answer?