Question 1166594
d, hotdog price
b , hamburger price


{{{system(5d+4b=17.75,4d+5b=18.25)}}}

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You could choose either substitution or elimination method right away, but in this example, see what happens if you add the left members and equate to the add of the right side members:

{{{9d+9b=36}}}
and simplify this:
{{{d+b=4}}}.


NOW, choosing either of the first two equation, and this simpler equation, choosing for elimination method may be a little easier to do.

{{{system(d+b=4,5d+4b=17.75)}}}
You might almost see in your head here, {{{d=1.75}}}.

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