Answer
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)
Algebra 1
by Hall, Prentice
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
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