Carly's dog, Rex, is five years old. • At the end of his first year, Rex weighed
15.3 kilograms.
By the end of his second year, he
gained 4.2 kilograms.
• He lost 1.7 kilograms by the end of his
.
third year.
• He lost 0.5 kilogram the next year.
• In his fifth year, he gained 1.7 more
kilograms.
Which equation represents Rex's current
weight in kilograms?