Question

2x+y=5 x-3y=-1
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Answer 1

2x+y=5     y=5-2x
x-3y=-1

X-3(5-2x)=-1
X-15+6x=-1
7x=-1+15
7x=14
x=14/7
x=2 

y=5-2x
y=5-2.2
y=5-1
y=1