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A carpenter have several boards of equal length. He cuts 3/5 of each boards .After cutting the boards the carpenter notices that he has enough pieces left over to make up the same length as 4 of the original borads. How many boards did the carpenter start with ? please answer today thanks

Respuesta :

So the board is divided into 5 pieces, and 2/5 of the board is left. The leftovers equal 4 originals. This is equal to 4 times 5.
equation:
2/5(5x)=20 
2x=20
x=10
He started with 10 boards.
Hope this helps!