-5 = n+1
subtract 1 from each side
-5-1 =n+1-1
-6 =n
-6=x+2
subtract 2 from each side
-6-2 =x+2-2
-8 =x
y-9=-2
add 9 to each side
y-9+9 = -2+9
y = 7
x-4 = -10
add 4 to each side
x-4+4 = -10 +4
x = -6
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