Design of mathematics exhibition board in primary school - Training Enrollment Network

Design of mathematics exhibition board in primary school

Let the small display board be a fast, then the large display board is (15-A).

So 5A+20( 15-A)= 165.

5A+300-20A= 165

300- 15A= 165

15A= 135

A=9

Therefore, if the number of small panels is 9, then the number of large panels is 15-9=6.

5×9+6×20= 165

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