3x-4y=-14 6x+3y=27 don’t understand how to solve

Ineed to know the rule for the sequence. plz !

The amount of money, in dollars, in an account after t years is given by a = 1000(1.03)^t. the initial deposit into the account was $_^a0 and the interest rate was _a1% per year. only enter numbers in the boxes. do not include any commas or decimal points^t. the initial deposit into the account was $__^a0 and the interest rate is % per year.

Find the balance at the end of 4 years if 1000 is deposited at the rate of