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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Subtract the 2 numbers
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$- 1$
Subtract the 2 numbers
$\color{#FF6800}{ 0 } - 1$
$ $ 0 does not change when you add or subtract $ $
$- 1$
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