x√2 - y = 4
2√2×√2 - 0 = 4
2×2 - 0 = 4
4 - 0 = 4 (A)
0,5x + 5y = √2
1/2×2√2 + 0 = √2
√2 + 0 = √2
√2 = √2 (A)
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x + y = 9
5 + 4 = 9
9 = 9 (A)
2x - y = 0
2×5 - 4 = 0
10 - 4 = 0
6 = 0 (F)
2x - y = 6
2×5 - 4 = 6
10 - 4 = 6
6 = 6 (A)
3x + y = 9
3×5 + 4 = 9
15 + 4 = 9
19 = 9 (F)
x - y = 1
5 - 4 = 1
1 = 1 (A)
- x + 2y = 3
- 5×5 + 2×8 = 3
- 25 + 16 = 3
- 9 = 3 (F)