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Sagot :
[tex]y=3x-1 \\
x-y=-9 \\ \\
\hbox{substitute 3x-1 for y in the 2nd equation:} \\
x-(3x-1)=-9 \\
x-3x+1=-9 \\
x-3x=-9-1 \\
-2x=-10 \\
x=\frac{-10}{-2} \\
x=5 \\ \\
y=3x-1=3 \times 5-1=15-1=14 \\ \\
(x,y)=(5,14)[/tex]
The y-coordinate is 14.
The y-coordinate is 14.
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