Alice has $15 more than Barry. Charlene has only 2 times of the amount of Barry's money. If Alice has x dollars, how much money do they have altogether?

X=alice

b=barry

c=charlene

x=15 more than b

x=15+b

c=2 times of b

c=2b

all together

x+c+b

15+b+2b+b

15+4b

they have 15+4b or 15+4 times of barry

if we want in terms of x

x=15+b

x-15=b

15+4 (b)

15+4 (x-15)

15+4x-60

4x-45

they have 4x-45 together