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Question 1 · 3 marks
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Edexcel 9FM0
Solve the simultaneous equations
x
+
2
y
−
z
=
1
x + 2y - z = 1
x
+
2
y
−
z
=
1
,
2
x
−
y
+
3
z
=
12
2x - y + 3z = 12
2
x
−
y
+
3
z
=
12
,
3
x
+
y
+
z
=
10
3x + y + z = 10
3
x
+
y
+
z
=
10
.
x
=
x =
x
=
y
=
y =
y
=
z
=
z =
z
=