.
Let x be the maximum value of the full priced computer she can afford if she pays cash
(i.e. exactly the unknown value under the question).
Then the equation for x, from the given condition, is
0.97*(0.85x) = 1500 dollars, (1)
where 0.85 = 1-0.15 and 0.97 = 1-0.03.
From equation (1)
x = = 1819.28 dollars. ANSWER to Q1
The answer to the second question is
difference = 1819.28 - = 1819.28 - 1764.71 = 54.57 dollars. ANSWER to Q2
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The "after-solution" notice.
The problem's formulation in THIS post ( "exactly as in the textbook" ) is correct and meaningful.
The problem's formulation in your previous post was nonsensical.
The conclusion, the diagnosis and the advise for the future :
if you do not understand the subject,
do not make your arbitrary changes in the original formulations.
Post them "word-in-word", as is.
/\/\/\/\/\/\/\/
In one of my previous posts, I wrote once that, according to my feeling,
there is a "visitor" in this forum at the opposite end of the Internet,
who permanently and intently corrupts every post he submits.
It looks like that my suggestion was correct, and now I detected and discovered this visitor.