Answer
Never
Work Step by Step
$y=ax$
$y=ax + 4$
$ax = ax+4$
$ax-ax = ax+4-ax$
$0 \ne 4$
Since we have a false statement ($0 \ne 4$), the two lines will never have a solution.
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 - 6-2 Solving Systems Using Substitution - Practice and Problem-Solving Exercises - Page 373: 40
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