Step-by-step explanation:
Libby has 20 sweets.
Jim also has 20 sweets.
Libby gives Jim x sweets.
Libby then eats 3 of her sweets.
Jim then eats half of his sweets.
The expressions for the number of sweets Libby and Jim now have.
Libby:at first he had x sweets
he eats three.so,no.of sweets he has at
present are(x-3) sweets
Jim: at first he had 20 sweets
he eats half of them.so,no.of sweets he has at
present are 10 sweets