## Algebra 1

Published by Prentice Hall

# Chapter 6 - Systems of Equations and Inequalities - Cumulative Test Prep - Multiple Choice - Page 409: 10

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#### Work Step by Step

$2w+2l = 400$ $x=2w$,$y=2l$ $x+y=400$ $2x+2y =?$ $x+y+x+y=?$ $400+400=800$

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