Amount Lauren had at first = x
(length of the upper bar model)
After buying a dress, the remainder
= r (length of the lower bar model)
From the lower bar model,
$72=3/Sofr=3/5x r
So 1/5 of r =$72/3 = $24, and
r = 5 x $24 = $120
From the upper bar model,
Amount spent on a dress = 0.20x
= 1/5 ofx
So R = 4/5 of X= 4/5 x x, which
implies that
$120 = 4/5 of x = 4/5 x x
So 1/5 ofx = $120/4 = $30, and
x= 5 x $30 $150
Amount Lauren had at first = x(length of the upper bar model)After buying a dress, the remainder= r (length of the lower bar model)From the lower bar model,$72=3/Sofr=3/5x rSo 1/5 of r =$72/3 = $24, andr = 5 x $24 = $120From the upper bar model,Amount spent on a dress = 0.20x= 1/5 ofxSo R = 4/5 of X= 4/5 x x, whichimplies that$120 = 4/5 of x = 4/5 x xSo 1/5 ofx = $120/4 = $30, andx= 5 x $30 $150
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