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Solving 2 linear equations using Cramer's rule.
3x - 7y = 5
5x + 3y = 11
3
*
3
-
(
-
7
)
*
5
=
44
.
0
[DetA]
5
*
3
-
(
-
7
)
*
11
=
92
.
0
[DetAx]
3
*
11
-
5
*
5
=
8
.
0
[DetAy]
x:
[DetAx]
/
[DetA]
=
2
.
09
090
909
091
…
[x]
y:
[DetAy]
/
[DetA]
=
0
.
18
181
818
181
8
…
[y]
verification:
3
*
[x]
-
7
*
[y]
=
5
.
0
[6]
5
*
[x]
+
3
*
[y]
=
11
.
0
[7]
ok
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Solving 2 linear equations using Cramer's rule. 3x - 7y = 5 5x + 3y = 11 3 * 3 - ( - 7) * 5 |DetA 5 * 3 - ( - 7) * 11 |DetAx 3 * 11 - 5 * 5 |DetAy x: [DetAx] / [DetA] |x y: [DetAy] / [DetA] |y verification: 3 * [x] - 7 * [y] 5 * [x] + 3 * [y] ok
This month's formula: basic two vector operations.
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