Algebra 1

Published by Prentice Hall
ISBN 10: 0133500403
ISBN 13: 978-0-13350-040-0

Chapter 6 - Systems of Equations and Inequalities - 6-4 Application of Linear Systems - Lesson Check - Page 386: 2


x=1 y=3

Work Step by Step

x= amount of 30% gold y=amount of 10% gold Given based to the problem: x+y=4 0.3x+0.1y=0.15(4) x=4-y 0.3(4-y)+0.1y=0.15(4) 1.2-0.3y+0.1y=0.6 -0.2y=-0.6 y=3 x=4-3 =>x=1 Solution (1,3)
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