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Unformatted text preview: Put them into a system and solve for y and z (elimination). 4)7y + 2z = 15 5) 6y 3z = 18 Solving by Substitution Step 4: Substitute values for y and z into one of the original equations. 1) x 2y + z = 4 You try! = + +== +7 2 2 5 2 6 3 z y x z y x z y x Homework p. 153 # 1015...
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 Fall '09
 Johnson
 Algebra, Equations

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