Answer:
Sue = 13 - x
(18 + x) / 2
Step-by-step explanation:
Initial Number of sweets:
Tony = 18
Sue = 18
Sue Gives tony x ;
Tony = 18 + x
Sue = 18 - x
Sue eats 5 of her sweets :
Sue = 18 - x - 5
Sue = 13 - x
Tony eats half of his sweets:
(18 + x) / 2