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OpenStudy (anonymous):
solve the system by substitution -x-y-z=-8 -4x+4y+5z=7 2x+2z=4 Please help, totally confused with this one.
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OpenStudy (anonymous):
solve for one of the variables in any question, then substitute your result into a second equation.
OpenStudy (anonymous):
That is what I have tried and I get fractions for answers. Not sure if that is right. Thanks.
OpenStudy (anonymous):
what did you get?
OpenStudy (anonymous):
hm. well the answers should not be fractions. let's see
OpenStudy (anonymous):
i'd solve for 'x' in equation 3, then substitute that value into both equations 1 and 2.
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OpenStudy (anonymous):
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