79 + 45 = 124
79
79.
It is: 79 minus 45 = 34
1,042
The isotope, Se-79, has 45 neutrons (79 - 34 = 45)
79 + 79 = 158
Sum = 79*(79+1)/2 = 79*80/2 = 3160
a + 79
45/79 x 100 = 56.9620253164556 recurring (that is, 56.96202531645569620253164556...) percent.
From least to greatest: -45, -14, 79
79 + 79 = 158
79 + 79 = 158 / 2 = 79.