How do you write 7 increased by number u?

Hint: We are given a statement and we have to write it mathematically. It says “7 increased by number u” that means initially we have the number 7. And to this number 7, something extra is added so that it’s value is increased. This extra term which is added is the number u. Using the addition operator, we will add the number u to 7.

Complete step by step answer:
According to the question given to us, we have a statement, which we have to write mathematically. We will use appropriate operations and operators for the same.
The given statement that we have is,
“7 increased by number u”
As per this statement, we can understand that initially we had the number 7 alone. Now, we are trying to increase the value of this number by adding an additional number to it. It is given that the number that is to be added is number u. So, for this statement we have the number 7 to which we will use the addition operator and carry out the addition operation. And we will have the value of the number 7 increased.
The mathematical expression that we get based on the above discussion is,
\[7+u\]
Therefore, the equivalent mathematical expression that we have is, \[7+u\].

Note:
The question should be read carefully and interpreting of the statements should be done step wise to prevent mistakes. Very common misunderstanding by students is that they consider that “increased by” refers to multiplication and end up writing the answer as 7u. This is wrong. If the question was 7 increased by u times, then 7u would have been right.