Answer
$550$ calories for lunch, $675$ calories for breakfast, $800$ calories for dinner.
Work Step by Step
Let $x$ be the calories from lunch, then $x+125$ is the calories from breakfast, $2x-300$ is the calories from dinner. Thus the equation is: $x+x+125+2x-300=2025\\4x-175=2025\\4x=2200\\x=550$
Thus there were $550$ calories for lunch, $675$ calories for breakfast, $800$ calories for dinner.
