Algebra 1: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281140
ISBN 13: 978-0-13328-114-9

Chapter 6 - Systems of Equations and Inequalities - 6-3 Solving Systems Using Elimination - Practice and Problem-Solving Exercises - Page 383: 32

Answer

(4,10)

Work Step by Step

You have the equations y=2.5x and 2y+3x=32. Substitute the first equation into the second equation: 2(2.5x)+3x=32. -distribute- 5x+3x=32 -simplify- 8x=32 -divide both sides by 8- x=4 Plug in x=4 into one of the equations: 2y+3(4)=32 -distribute- 2y+12=32-subtract 12 from both sides- 2y=20 -divide both sides by 2- y=10 Plug in x=4 and y=10 into one of the equations to check your work: 10=2.5(4) 10=10 The solution is (4,10)
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