Can someone please help me write out an equation to solve this question?
Q. Six people are sitting in a room. When an 80 year old man enters the room, the average age of the people in the room doubles. What was the average age of the six people originally sitting in the room?

Question

Can someone please help me write out an equation to solve this question?
Q. Six people are sitting in a room. When an 80 year old man enters the room, the average age of the people in the room doubles. What was the average age of the six people  originally sitting in the room?

anonymous · Answer

6 + 80 = x
x ÷ 2 = answer

anonymous · Answer

X= 34? 
So x is representing the average age of the 6 people?

anonymous · Answer

Oops 43**

anonymous · Answer

Wait let me think out loud

86 made it double so before it would have been 43 soooo 43 ÷ 6

unklerhaukus · Answer

i dont think thats right becca

anonymous · Answer

I don't think that's right actually

anonymous · Answer

Dont we have to work with fractions or something?

anonymous · Answer

let "x" be sum of ages of 6 ppl, "t" their average age.

x/6 = t
(x+80)/7 = 2t

anonymous · Answer

two equations and two unknowns. you can solve them... ?
question is asking to find t

anonymous · Answer

Oh! Thank you @ramya25 that helped me a lot

anonymous · Answer

np :)

anonymous · Answer

Sum of ages of 6 people = 6*A

Sum of ages of 6 people + X = 7*(2A)

6*A + 80 = 14A

8A = 80

A = 10

Average = 60..

anonymous · Answer

T = 10!!

anonymous · Answer

Yes Average = 10..

anonymous · Answer

Thanks everyone!

anonymous · Answer

Not 60 It is 10 I have written wrong there...

anonymous · Answer

HAHA I still understand it, so it's okay (: