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OpenStudy (anonymous):
The following system is solved by substitution. Which expression is substituted for z in the second and third equations? x + 5y – z = 6 3x – y – 2z = 4 3x – 2y + 3z = 13
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OpenStudy (chihiroasleaf):
x = 6-5y+z substitute into the second and the third equation then you'll have the system in y and z, solve to find y and z
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