Maths Algebra Puzzle

My Solution:

Apple: 48 = 3 apples
           16 = 1 apple

Pen: 39 = 2 apples + 1 pen
        32 = 2 apples
        7 = 1 pen

Ladybug: 35 = 2 apples + 1 ladybug
                32 = 2 apple
                3 = 1 ladybug

Apple: 16
Pen: 7
Ladybug: 3