we have
2x + 6y = 10
For x=-1
substitute the value of x in the expression and solve for y
so
2(-1) + 6y = 10
-2+6y=10
6y=10+2
6y=12
y=2
For x=1
substitute the value of x in the expression and solve for y
so
2(1) + 6y = 10
6y=10-2
6y=8
y=4/3
For x=2
substitute the value of x in the expression and solve for y
so
2(2) + 6y = 10
6y=10-4
y=1
therefore
the values of y are
y=2, 4/3,1