10+9+15+8+4+6+11=63
(1/3) + (4/10) = (5/15) + (6/15) = 11/15
15
4 + (-15) = 4 - 15 = -11
It is 11 over 15.
-15 + 4 = -11
It is: -5+10+11-4 = 12
4/12 + 11/15 = 1 1/15
If: y+15 = 11 Then: y = -4
-11
If: y+15 = 11 Then: y = -4
4+4=8+0=8+1=9+1=10+0=10+1=11 It equals 11. You're welcome.
(11/20) + (3/4) = (11/20) + (15/20) = 26/20 = 13/10 = 1.3