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Sixth grade mathematics book 1 55
1, solution: We planted X trees altogether.

3/8x+( 1-3/8x)(2/3)+55 = x+ 1/4x

3/8x+5/ 12x+55=5/4x

3/8x+5/ 12x-5/4x=-55

1 1/24x=55

x= 120

A total of 20 trees/kloc-0 were planted.

2、

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