ANSWER
Situation J cannot be represented by the equation
Step-by-step explanation
It is said in situation J that there are 10 adults in the group and there are 45 students also. This question asks for 'x' that's the total number of students and adults in the group. This equation should be:
Which, if we rewrite it to keep 45 on one side of the equaition and the rest on the other side is: