Linear
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This document contains a system of linear equations with four unknown variables (f1, f2, f3, f4) and their coefficients. It first lists the four equations, then writes them in matrix form and solves for the variables, finding that f1=15, f2=5, f3=20, and f4=0.
Linear
- 2. A讌 f1+f4 = 15 B讌 f1= f2+10 C讌 f2+f3+5 =30 D讌 f4+20 = f3
- 3. f1+f4 = 15 f1-f2 = 10 f2+f3 = 25 f3-f4 =20 1 0 0 1 15 1 -1 0 0 10 0 1 1 0 25 0 0 1 -1 20
- 4. 1 0 0 1 15 0 1 0 1 5 0 0 1 -1 20 0 0 1 -1 20 1 0 0 1 15 0 1 0 1 5 0 0 1 -1 20 0 0 0 0 0 1 0 0 1 15 1 -1 0 0 10 0 1 1 0 25 0 0 1 -1 20 1 0 0 1 15 0 -1 0 -1 -5 0 1 1 0 25 0 0 1 -1 20 f1 15 f2 5 f3 20 f4 0