The original price of a washing machine is 1350 yuan, and now it is sold at a 20% price reduction. At this time, the price is 19 yuan more than the cost. How much is the cost price of this washing machine?
1350 × (1-20%), = 1350 × 0.8, = 1080 (yuan), 1080 ^ (1 + 19), = 1080 ^ (109), = 972 (yuan). Answer: the cost price of this washing machine is 972 yuan
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