Question 976078
This can be reduced to a single variable equation:

X=Sodas
X+50 = Hotdogs

X+X+50 = total sales = 188

2X+50 = 188

2X = 138

X= 69 (soda)

X+50 = 119 (hot dogs)



Keep in mind, this has the feel of 2 equations and 2 unknowns, but that approach is a time waster. The above method works, is correct, and far faster. Recognize when to use it vs when you really need the alternate method.