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OpenStudy (anonymous):
using the method of substitution how do I solve 25x+5y=11 -5x=y+10
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OpenStudy (mertsj):
From the second equation, y = -5x-10 Put that into the first equation in place of y
OpenStudy (anonymous):
so is it25x+5(-5x-10)=11
OpenStudy (mertsj):
\[25x+5(-5x-10)=11\]
OpenStudy (mertsj):
\[25x-25x-50=11\]
OpenStudy (mertsj):
\[0-50=11\]
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OpenStudy (mertsj):
\[-50=11\]
OpenStudy (mertsj):
NO!! NOT TRUE!!! There is no solution. The lines must be parallel. Let's check the slopes and see if they are the same.
OpenStudy (mertsj):
Sure enough. The slopes are both -5 so the lines are parallel and there is no solution.
OpenStudy (anonymous):
well that is what I was wondering couldn't seem to get it was close thanks
OpenStudy (mertsj):
yw
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