The function, f, defined by f(t) = 1,000• (1.07)t, represents the amount of money in a bank account t years after it was opened.
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For this case we have the following system of equations:
We multiply the first equation by -4:
We have the following equivalent system of equations:
We add the equations:
We find the value of the variable "x":
Thus, the solution of the system is:
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