Fill in the Blank

An interior designer is calculating the dimensions of a rectangular conference room with a perimeter of 80 feet. The length (LL) is 10 feet more than the width (WW), giving the equation L=W+10L = W + 10. To solve the system of equations ($2L + 2W = 80andandL = W + 10)usingthesubstitutionmethod,thedesignermustreplacethevariable) using the substitution method, the designer must replace the variable L$ in the perimeter equation with the expression ____.

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Updated 2026-04-18

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