Respuesta :
if the two pieces are X and Y, and one is X feet then to find the other just subtract X from the total. it would be Y = 9 - X
Answer:
9 - X
Step-by-step explanation:
Total length of a board = 9 foot
Let there are two pieces of the board.
length of one piece of the board = X
Length of other piece of the board = Y
According to the question,
sum of the length of two pieces = 9 foot
X + Y = 9
Y = 9 - X
Thus, the length of other piece is 9 - X.