L = 3W
2L + 2W = 40
Substitute 3W for L in the second equation and solve for W. Insert that value into the first equation to solve for L. Check by putting both values into the second equation.
rectangular room is
3
3
times as long as it is wide, and its perimeter is
40
40
meters. Find the dimension of the room.
The length is : meters and the width is
1 answer
1 answer