Solve the system of equations 2x-y=1; x+2y=8 graphically and find the coordinates of the points where corresponding lines intersect y-axis.
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$y = - x - 1$
$x$Intercept
$\left ( - 1 , 0 \right )$
$y$Intercept
$\left ( 0 , - 1 \right )$
$x = - y - 1$
$ $ Solve a solution to $ x$
$y = \color{#FF6800}{ - } \color{#FF6800}{ x } - 1$
$ $ Move $ x $ term to the left side and change the sign $ $
$y \color{#FF6800}{ + } \color{#FF6800}{ x } = - 1$
$\color{#FF6800}{ y } + x = - 1$
$ $ Move the rest of the expression except $ x $ term to the right side and replace the sign $ $
$x = - 1 \color{#FF6800}{ - } \color{#FF6800}{ y }$
$x = \color{#FF6800}{ - } \color{#FF6800}{ 1 } \color{#FF6800}{ - } \color{#FF6800}{ y }$
$ $ Organize the expression $ $
$x = \color{#FF6800}{ - } \color{#FF6800}{ y } \color{#FF6800}{ - } \color{#FF6800}{ 1 }$
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