The creek

Workers cleaned the creek within three days. On the first day, cleanse one-fifth of the creek's length, the next day 40% of the stream's length, and the third day, 8 km length of the creek. How long is a creek?

Correct answer:

x =  20 km

Step-by-step explanation:

5x+0.40x+8=x  x/5+0.40 x+8=x  2x=40  x=240=20  x=20=20 km

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