L = length of board piece
a = length of first piece
b = length of second ( shorter ) piece
a = 2 b - 3
L = 18 = a + b = 2 b - 3 + b = 3 b - 3
3 b - 3 = 18 Add 3 to both sides
3 b - 3 + 3 = 18 + 3
3 b = 21 Divide both sides by 3
3 b / 3 = 21 / 3
b = 7 ft
a = 2 b - 3
a = 2 * 7 - 3 = 14 - 3 = 11 ft
A carpenter wants to cut an 18-foot board into two pieces so that one piece is 3 feet shorter than twice the shorter piece. Where should he make the cut?
---?--- ft from one end
3 answers
a carpenter cut a 3- meter board into four pieces of equal length . how
many centimeters long was each piece?
many centimeters long was each piece?
i need help with my homework
1 answer