Quoted By:
soda = s
s + s + s = 30
3s = 30
s = 30/3
s = 10
burger = b
10 + b + b = 20
b + b = 20 - 10
b + b = 10
2b = 10
b = 10/2
b = 5
fries = f
5 + f + f = 9
f + f = 9 - 5
2f = 9 - 5
2f = 4
f = 4/2
f = 2
b + f * s = x
5 + 2 * 10 = x
5 + 20 = x
x = 25