This is an algabraic problem, so we would use variables: Length=x Width=y The length is four times the width, so x=4y Since the equation for perimeter is P= 2(x+y), you would instead substitute 4y for x, and 7 for the perimeter. 7=2(4y+y) Simplify. 7=2(5y) 7=10y y=7/10 Since y is 7/10, you would substitute 7/10 into the equation x=4y. x=4(7/10) x=14/5 So, the dimensions are 7/10 x 14/5. Hope this helps!
