Peter has twice many stickers as Ali. Ali has 40 more stickers than Carlos. They have 300 stickers altogether. How many stickers does Peter have?

Answer 1

Let c be the number of stickers that Carlos has.

c + c + 40 + 2c + 40 = 300

4c = 220

c = 55

Answer 2

That's not right. c does not equal 55.

Peter - 2 x c
Ali - Has c + another 40
Carlos - c

(2c) + (c + 40) + (c)
= 4c + 40 = 300
= 4c = 300-40
= 4c = 260
= 4c / 4 = 260 / 4
= 0 = 65
c = 65

Feel free to correct me if I'm wrong.

Answer 3

Carlos=a
Ali=a+40
Peter=2(a+40)
a+a+40+2a+80=300
4a+120=300
4a=180
a=45