When finding parametric equations for the line of intersection of two given planes, how do we use two equations (one from each plane) and three unknowns to have a free variable and parameterize the line of intersection? Please do an example with planes x + y + z = 1 and x + 2y + 2z = 1, and explain each step carefully and use typefont. Thank you!

Algebra and Trigonometry (MindTap Course List)
4th Edition
ISBN:9781305071742
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:James Stewart, Lothar Redlin, Saleem Watson
Chapter9: Vectors In Two And Three Dimensions
Section9.6: Equations Of Lines And Planes
Problem 37E
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When finding parametric equations for the line of intersection of two given planes, how do we use two equations (one from each plane) and three unknowns to have a free variable and parameterize the line of intersection? Please do an example with planes x + y + z = 1 and x + 2y + 2z = 1, and explain each step carefully and use typefont. Thank you!

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