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Mathematics 21 Online
OpenStudy (anonymous):

what are the coordinates? for y=2x-5 x-2y=-8

zepdrix (zepdrix):

Let's solve this system using substitution. \[\large \color{royalblue}{y=2x-5}\]\[\large x-2\color{royalblue}{y}=-8 \qquad \rightarrow \qquad x-2\color{royalblue}{(2x-5)}=-8\] From here, we can solve for x since that is the only variable in our equation.

zepdrix (zepdrix):

Understand how I plugged that in? :o

OpenStudy (anonymous):

yeah you want to solve for x correct?

zepdrix (zepdrix):

yes c: If we solve for x, we can plug that x value into one of the two equations to find a corresponding y value. That will be the coordinate pair we were looking for.

OpenStudy (anonymous):

i get (6,7) :) thanks for your help

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