TEST BANK FOR Linear Algebra with Applications 5th Edition By Otto Bretscher Converted
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Exam (elaborations) TEST BANK FOR Linear Algebra with Applications 5th Edition By Otto Bretscher (Solution Manual)-Converted
- Exam (elaborations) • 444 pages • 2021
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Section 1.1 
1.1.1 
 
x + 2y = 1 
2x + 3y = 1 
 
−2 × 1st equation → 
 
x + 2y = 1 
−y = −1 
 
÷(−1) → 
 
x + 2y = 1 
y = 1 
 
−2 × 2nd equation 
→ 
 
x = −1 
y = 1 
 
, so that (x, y) = (−1, 1). 
1.1.2 
 
4x + 3y = 2 
7x + 5y = 3 
 
÷4 
→ 
 
x + 3 
4y = 1 
2 
7x + 5y = 3 
 
−7 × 1st equation → 
 
x + 3 
4y = 1 
2 
−1 
4y = −1 
2 
 
×(−4) → 
 
x + 3 
4y = 1 
2 
y = 2 
 
−3 
4 × 2nd equation → 
 
x = −1 
y = 2 
 
, 
so that (x, y) =...
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