Maths

In maths we did this problem about  x's and we had to figure out a Marie problem we had to look for how  match more x's we need to solve the problem so we read the problem and I said this is a interesting  problem then we had to figure it out first we did 3 times 10 and that made 30 then that was the first answer then we did 4 times 10 + 2 why do you think we did that?We did that because there were 5 for the first x's and the second one was 9 so we said if 5 +4=9 then lets say we can take away one from the 5 and times the 4 by ten and + 1  to make _ so then we did it and it made 41 so that is how we got the second problem.
Then for the last one we said okay there were 6 for the first and 10 for the second but 16 for the 3 x's so we said if we take away 2 from the 16 then times it so we did 4 times 10+2 because we took away 2 to make 14.Then we said 42 is the answer.