Altogether is 400 because total means to add and 200 + 200 = 400. That's the answer to your question.
You would have to divide 105 by 7 and get an answer then you times that answer by nine and get your answer
Im pretty sure the answer is x=-2
C.) 30 since they both have 5's just take them out then subtract 50 and 20 *but make sure u take out the decimal though* so after u subtract u will get 30 then line it up and put the decimal back then it will be .30
4/4=1
4÷4=1
4÷4=1
1/1= 1
hope this helps :)