Negative 10 and positive 3
Itself and any other number multiplied by it.
190
5 subsets of 4 and of 1, 10 subsets of 3 and of 2 adds up to 30.
-10 and 1
255
37
Negative 10 and positive 3
Itself and any other number multiplied by it.
The factors of 30 are 1, 2, 3, 5, 6, 10, 15, and 30. The factors 1+3+5+10=19, 1+2+6+10=19, 1+3+15=19, and 3+6+10= 19.
The following are just a few examples: 10 + (-20) = -10 20 + (-30) = -10 25 + (-35) = -10 100 + (-110) = -10
(-240,1)(-120,2)(-80,3)(-60,4)(-48,5)(-40,6)(-30,8)(-24,10)(-20,12)(-16,15)(240,-1)(120,-2)(80,-3)(60,-4)(48,-5)(40,-6)(30,-8)(24,-10)(20,-12)(16,-15)
170
-37
190
30 and -1
5 subsets of 4 and of 1, 10 subsets of 3 and of 2 adds up to 30.