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

Answer is 150 explanation