Kai and Dinny folded paper stars over two days. On Friday, Kai folded 21 more
paper starts than Dinny. On Saturday, Dinny folded another 39 paper stars. At the
end of the two days, Kai folded \( {3 \over 7}{}{}\) of the total number of paper stars. How many
paper stars did Kai fold?
(1) 126
(2) 72
(3) 54
(4) 18
+1694 Kai folded x + 21 starts
Dinny folded x + 39 starts
(x + 21)/(x + 39) = (3/7)/(4/7)
x = 33
Kai folded 54 starts
