45 + 5= ? -100.The missing number is

The missing number is 150

Step-by-step explanation:

45 + 5= ? -100

To carry out the problem we are going to call x to (?)

45 + 5= x -100

we see that we have a -100 of the second side of the equality, to get it out of there we can add 100 in both parts of the equality

45 + 5 + 100 = x -100 + 100

now we just solve and we have left

45 + 5 + 100 = x

As we see this is a common sum, by which we can already add it and obtain the value of x

150 = x

Step-by-step explanation:

36/78 = 0.46153 nope.. not a choice

36/123 = 0.2926 so the last answer looks good