
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
John has $1500 to invest. He invests part of the money at Trusty Savings Bank, which compounds annually at 4%. He invests another portion at Solid Growth Bank, which compounds annually at 6%, and the remaining money at Quick Gains Bank, which compounds annually at 7%. After three years, John has a total of $1800. How much did John originally invest in Trusty Savings Bank?

Present the answer in LaTex format: \boxed{Your answer}
user