Akira buys 50 tokens at the carnival. He gives his sister tokens for 5 kiddie rides. His sister is too small to ride alone, so Akira must use tokens to go on the kiddie rides with her. He wants to use at least some of the remaining tokens for thrill rides. How many thrill rides can he go on?

the square root of what number? if you add that, then someone will probably answer the question.

let x and 400 - x be the two numbers.  

==> 0.80x + 0.85(400 - x) = 400 - 68 from the statement of the problem.  

< ==> 0.80x + 0.85(400 - x) = 400 - 68  

==> 340 - 0.05x = 332  

< ==> -0.05x = -8 ==> x = 160, the first number ==> 400 - x = 240, the second number.