Its 8
not sure how to show the work but drew a pic and its 8
If the student got a true statement, it is an identity
example, ending with x=x or 10=10 means it is an identity
if the student ended up with a false statement, there is no solution
example, 10=2
905,154 will be rounded to 910,000 and 89,659 will be rounded to 100,000
hope this helps
4x=40/2, so 4x=20, so x=5, so 5*15=75