Anything minus itself is zero.
Answer : 130
X= plus or minus 1
X is less than or equal to 4.
Yes, it is.
it is equal to +x
It is equal to zero.
Anything minus itself is zero.
If: x-6 = -8 then x = -2
Answer : 130
2x minus 3x is equal to -x.
X= plus or minus 1
X is less than or equal to 4.
x is less than or equal to 15
Yes, it is.
If: -x-5 = -2 then x = -3
if x is equal to the square root of 81 then x is ±9 (plus or minus 9)