Question 844082
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Hi,
How many {{{ highlight_green(x) }}}quarts of pure antifreeze must be added to 
2 quarts of a 30% antifreeze solution to obtain a 40% antifreeze solution?
x + .30(2QT) = .40(2QT + x)
x + .30(2QT) = .40(2QT) + .40x
   .60x = .10(2Qt)
      x = .10(2Qt)/.60