Apple + Apple + Apple = 30 Puzzle

Apple + Apple + Apple = 30 Puzzle

Apple + Apple + Apple = 30
Apple + Strawberry + Strawberry = 18
Strawberry - WaterMelon = 2
WaterMelon + Apple x Strawberry = ?

Note : The Text above is only for instructional purposes, See Image for solving.

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Answer is 21
Logic :
Apple = 10
2 Strawberry = 4, Hence 1 Strawberry = 2
2 WaterMelon = 2, Hence 1 WaterMelon = 1
So,
WaterMelon + Apple x Strawberry = 1 + 10 x 2 = 1 + 20 = 21 (Using Bodmas method)
Hence answer is 21.