Answer:
1.
[tex]x=\frac{38}{7} \\y=-\frac{19}{7}[/tex]
2.
[tex]x=-\frac{82}{7} \\y=-\frac{19}{7}[/tex]
Step-by-step explanation:
4x+y=19
y=19-4x
x-5y=1
x-5(19-4x)=19
x-95+20x=19
21x=19+95
21x=114
x=114/21=38/7
y=19-4(38/7)
y=19-152/7
[tex]y=\frac{133-152}{7}=-\frac{19}{7}[/tex]
2.
x-y=-9
x=y-9
-2x+9y=-1
-2(y-9)+9y=-1
-2y+18+9y=-1
7y=-1-18
7y=-19
[tex]y=-\frac{19}{7}[/tex]
[tex]x=y-9\\x=-\frac{19}{7} -9\\x=\frac{-19-63}{7} \\x=-\frac{82}{7}[/tex]
