I'm sorry but it is impossible to answer the question you have asked for the lack of information. We could fix this issue if you display a picture of the equation!
Answer:
x = 7
Step-by-step explanation:
<u>1kg=1000g</u>
7kg*1000=7000g
10kg*1000=10000g
15g*1000=15000g
Answer: 512 times