I'm confused on a word problem...

a piece of fabric 180 inches long is cut into 2 pieces such that 3 times the larger piece exceeds 4 times the smaller piece by 85 inches. how large are the two pieces of fabric?
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1 Answer

x+y=180   or y=180-x

3y=4x+85

3y -4x=85

3(180-x) -4x=85

-3x -4x +540=85

-7x=85-540=-455

x=455/7

x=65

y=180-x =180-65=115
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