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OpenStudy (anonymous):
How do you solve this system of equations with 3 variables?
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OpenStudy (anonymous):
OpenStudy (anonymous):
Start solving and substituting. take the middle on and solve for z -2x-y+z=-3 isolate z z = +2x+y-3 use this value in place of z in another formula to solve for a different variable. solving until you have 1 variable, solve for exact value and plug that in to find the second real value, repeat to find the remaining one.
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