Novak

Novak needed to dig up three of the same pit in the garden. The first pit dug father alone for 15 hours. His second dig son helped him and it did that in six hours. The third pit dug son himself. How long it took him?

Correct result:

x =  10 h

Solution:


x/15+1=x/6

3x = 30

x = 10

Our simple equation calculator calculates it.



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