Answer :
Answer:
I hope the picture will help you
Step-by-step explanation:
While making the equation, that 360 upon x is cost of each person in the original group and 360 upon x + 2 is the cost of each person after adding two person in the group. then I have subtracted 9 from the 360 upon x because in the question it says that the each cost after adding the two member is less than 9 to that of cost of each person in the original group. I hope you understand. thank you!!
Answer:
Step-by-step explanation:
x = original group
Given:
360 / x -9 = 360 / (x+2) Find common denominator on the LEFT
(360 - 9x) / x = 360/ (x+2) cross multiply
360x - 9x^2 + 720 - 18x = 360 x simplify
9x^2 + 18x - 720 = 0 simplify further by dividing through by '9'
x^2 + 2x - 80 = 0 factor
(x +10)(x-8) = 0 shows x = 8 or -10 ( throw out==> extraneous)
x = 8 people originally