A biologist has 6 quarts of an 18% solution of salt. He adds x quarts of water to reduce it to an 8% solution of salt. Which equation correctly describes the situation?
A. 0.18(6) = 0.08x + 6
B. 0.82(6)+x) = 0.92x
C. 0.18(6) + x = 0.08(6+ x)
D. 0.82(6) + x = 0.92(6+x)
