As a term of an expression in math, 72w means 7 times w
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-63=7w
Ill assume you mean for an are of a rectangle. w will stand for width. So you know the equation for a rectangle is L*W, so if length is 7W, then the area is 7W*W=Area or 7W^2
16
127w = 847w/7 = 84/7w = 12
3w + 4e + 7w - e3 = 10w - e