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Foundations
easy
0:00.0
Evaluate
3
x
−
y
+
2
z
3x - y + 2z
3
x
−
y
+
2
z
when
x
=
2
x = 2
x
=
2
,
y
=
−
1
y = -1
y
=
−
1
,
z
=
3
z = 3
z
=
3
.
A
13
B
11
C
7
D
9
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