Because that is how negative numbers are defined.
Zero is the identity under addition.
x^2 - 7x = 0 x(x - 7) = 0 x = 0 or x - 7 = 0 x = 0 or x = 7
4x-y+7=0
That factors to (x - 2)(x + 7)
- 3.5 plus 10.5 equals 7 is one possible answer.
2x = -7 - 8y
4x+7=9x+7 -5x=0 x=0
It equals 7
It equals 7/6.
?+14=7+7 ?=0 7+7=14
Zero is the identity under addition.
0 is the additive identity for the set of numbers.
-7
minus 7 +7 =0 -7+7=0
That is correct!
0
p is obviously zero because any number x plus 0 equals itself.