Answer:
13 - x
(18 + x) /2
Explanation:
Given :
See = 18 sweets
Tony = 18 sweets
See gives Tony x sweets :
See = 18 - x
Tony = 18 + x
See eats 5 of her sweets:
See's sweets becomes :
18 - x - 5 = 13 - x
Tony eats half of his sweets;
Tony's sweets becomes ;
(18 + x) /2