. 19 + {(9-4 + (6-21) = (USE BODMAS)

Step-by-step explanation:

19 + {(9-4) + (6-21)} = 19 + {5 + (-15)}

                               = 19 + {5 - 15}

                              = 19 - 10

                              = 9

If this is the equation: 19 + [(9-4) + (6-21], then the answer is 9

Step-by-step explanation:

First step is to deal with the smaller (inner) brackets

9 - 4 = 5

6 - 21 = -15

Then the equation would be 19 + [5 + (-15)]

Next, deal with the larger bracket

5 + (-15) = - 10

The equation would then be 19 + (-10)

Then solve that which gives you 9

127

whether it's diameter, or radius, i believe if i remember correctly from school, every amount has to always add up to 180. so if you take 53, and starting adding, long story short, taking 127 and adding it to 53, gives you 180.