5*(-8)+7*(9) = 23
1,042
79 + 79 = 158
Sum = 79*(79+1)/2 = 79*80/2 = 3160
a + 79
79 + 79 = 158
79 + 79 = 158 / 2 = 79.
79
The solution to 79 plus 39 is 118. The solution to 79 minus 39 is 40.
200 plus 79 equals 279
15 + 41 + 23 = 79
79 + 35 = 114
49 + 79 = 128