Use the idea behind Example 15 with a graphing utility to solve the following systems of equations.

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Use the idea behind Example 15 with a graphing utility to solve the following systems of equations. Round answers to two decimal places. 

25x + 61 y – 12z = 25 12y + 7z = 10 z = -4 18x Зх + 4у — -4

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Related Book For  answer-question

Precalculus

ISBN: 978-0321716835

9th edition

Authors: Michael Sullivan

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