You can put this solution on YOUR website! P=2W+2L=24 or 2W=24-2L or W=24/2-2L/2 or W=12-L
A=W*L NOW SUBSTITUTE (12-L) FOR W & SOLVE FOR L
A=(12-L)L
TO SOLVE THE NUMERIC VALUES OF THIS RECTANGLE YOU NEED AT LEAST THE LENGTHOR THE WIDTH OR THE RELATIONSHIP BETWEEN THE WIDTH & THE LENGTH.
A=12L-L*2