- Hi i'm mr chad, and im going to solve this expression today
- 10x - 30 ;x= -1
- the first thing we need to do is substitute the -1 to any variable
- 10(-1) - 30
- next we change the subtraction into adding the opposite.
- 10(-1) +30
- next we multipy 10 and 1 which is 10
- now we have to check for exponents their are no exponents in this expression so nothing changes
- now we do the order of operations, the first thing we do is look for what's in the parenthesis, but theirs only -1 so we can't do anything yet
- 10+30
- next we subtract 10 from 30 and get 20
- 20
- 20 is the answer to the Expression!
- 20!