Answer:
The correct answer is $ 60. That is 3rd equation x/4=15.
Step-by-step explanation :
According to question, total person are four and each person is paying $15.
That means we have to multiply the amount paying by the each person to the number of persons.
Accordingly, 15 * 4 = 60
So 60 is the answer
Now, according to equation 1.
i.e., x/3=15
so 60/2=20
and 15 is not = 20
so this equation is not correct.
Now, according to 2nd equation
i.e., 15x=4
so 15 * 60 =900
and 900 is not equal to 15
according to 3rd one
i.e., x/4=15
so 60/4=15
and 15=15
so, this equation is used to find correct answer.