Solve the system of equations by graphing:
2
x
+
y
=
−
1
\displaystyle {2}{x}+{y}=-{1}
2
x
+
y
=
−
1
4
x
+
8
y
=
16
\displaystyle {4}{x}+{8}{y}={16}
4
x
+
8
y
=
16
Solution =
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