It is: 12+7+2 = 21
12 * (243 + 2) - 7 = 2933
It doesn't ! -7 plus -5 equals -12 ! -7 plus 5 equals -2
7/12 + 1/6 = 7/12 +(1×2)/(6×2) = 7/12 + 2/12 = (7+2)/12 = 9/12
-2
24/-2 + 7 = -12 + 7 = -5
2+ (2-3) / 7(3+9) 2+(-1)/7(12) = 1/84 or .012 if you meant to multiply the WHOLE equation by 7 it would be: 7[2+(2-3)/(3+9)] 7[2+(-1)/(12)] 7(1/12)= 7/12 or .583
7 over 12
12 - 7 = 5 5 + (-3) = 2
24/-2 + 7 = -12 + 7 = -5
7/12 1/6 = 2/12 5/12 + 2/12 = 7/12
7/12+1/2 = 7/12 +6/12 = 13/12