Answer:
vendor sold 90 sodas and 45 hot dogs
Explanation:
Let x = number of sodas sold
Let y = number of hot dogs sold
We have x = 2y (1)
( The number of sodas sold was two times the number of hot dogs sold)
We also have x + y = 135 (2)
( sold a combined total of 135 sodas and hot dogs.)
Substituting x = 2y we get
2y + y = 135
3y = 135
y = 135/3
y = 45
Therefore x = 135 - 45
x = 90
Therefore vendor sold 90 sodas and 45 hot dogs