Find the solution to the math problem of the second day of the Great God's junior high school - Training Enrollment Network

Find the solution to the math problem of the second day of the Great God's junior high school

Set purchase price x

Then the sales volume in the first month =6000/0. 25X

Sales in the second month =6000/0. 25X+80, with a profit of 0. 1X

(6000/0。 25X+80)*0 . 1X=6000+400

2400+8X=6400

X=500

Then 6000/(0. 25*500)+80= 128 pieces

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