Question

Un bicilist a parcurs un drum astfel incat in prima zi 1/4 din drum, a doua zi 5/6 din rest, ramandui de parcurs 28km. Cati km are intregul drum

Answer 1

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Answer 2

Notam cu x drumul

I zi x/4

II zi 5/6(x-x/4)=5/6(4x/4-x/4)=5/6×3x/4=5x/8

III zi 28

x/4+5x/8+28=x - intregul drum strabatut in cele 3 zile

2x/4+5x/8+224/8=8x/8 - impartim cu 8

2x+5x+224=8x

7x+224=8x

224=8x-7x

x=224 km