A company borrowed 400,000 yuan from a bank to develop a new product. It is known that the annual interest rate of this loan is 15% (excluding compound interest, that is, interest will not be calculat
A company borrowed 400,000 yuan from a bank to develop a new product. It is known that the annual interest rate of this loan is 15% (excluding compound interest, that is, interest will not be calculated repeatedly before repayment.
Suppose it takes x years to pay off in one lump sum.
(4×20-2.3×20-4×20× 10%)x = 40+40× 15% x，
(80-46-8)x=40+6x，
26x=40+6x，
20x=40，
x=2。 ?
A: It takes two years to pay off the loan in one lump sum.