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a 51-inch piece of steel is cut into three pieces so that the second piece is twice as long as the first piece, and the third piece is one inch more than seven times the length of the first piece. find the lengths of the pieces. what is the length of the first piece?

Sagot :

1st piece = x

2nd piece = 2x

3rd piece = 7x + 1

so  x + 2x + 7x + 1 =51

10x +1 = 51

10x = 50

x = 5

so 1st piece = 5
   2nd piece = 10
   3rd piece = 36
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