The answer of the above equation is 10.

Explaination:

Let the leaves plant be, P

the caterpillar be, C

the green apple be, G

Rearranging the equations, in the form of P, C & G

Equation (1); 5P + 5P + 5P = 15

Equation (2); C + C + C = 09

Equation (3); G + (G+C) + G = 30

Equation (4); (G+C) + (6P+C) * C =?

Now, starting from equation (1);

5P + 5P + 5P = 15

15P = 15

P = 1

Similarly, solve equation (2);

C + C + C = 09

3C = 09

C = 3

Now, substitute the C, in equation (3);

G + (G+C) + G = 30

3G + 3 = 30

3G = 27

G = 9

Now, put all the values to solve the final equation (4);

(G+C) + (6P+C) * C =?

= (9 + 3) + (6*1+3) * 3

= 12 + (9) * 3

(G+C) + (6P+C) * C = 39

(G+C) + (6P+C) * C =39