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Byju's Answer
Standard VII
Mathematics
Value of an Algebraic Expression
Find the valu...
Question
Find the value of:
5
x
+
3
y
−
6
z
,
w
h
e
n
x
=
3
,
y
=
5
,
z
=
4
A
7
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B
8
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C
6
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D
5
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Solution
The correct option is
C
6
5
x
+
3
y
−
6
z
,
w
h
e
n
x
=
3
,
y
=
5
,
z
=
4
5
x
+
3
y
−
6
z
=
5
(
3
)
+
3
(
5
)
−
6
(
4
)
=
15
+
15
−
24
=
30
−
24
=
6
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0
Similar questions
Q.
Find the value of
5
x
+
3
y
−
6
z
,
when
x
=
3
,
y
=
5
and
z
=
4.
Q.
If
x
3
=
y
5
=
z
4
=
5
x
−
3
y
+
4
z
P
. Find the value of
P
?
Q.
Find the value of: [4 MARKS]
(i)
p
+
q
+
3
r
w
h
e
n
p
=
1
,
q
=
5
,
r
=
2
(ii)
2
a
+
4
b
+
5
c
w
h
e
n
a
=
5
,
b
=
10
,
c
=
20
(iii)
3
a
−
2
b
w
h
e
n
a
=
8
,
b
=
10
(iv)
5
x
+
3
y
−
6
z
,
w
h
e
n
x
=
3
,
y
=
5
,
z
=
4
Q.
Equation of the plane containing the line
x
+
2
y
+
3
z
−
4
=
0
=
2
x
+
y
−
z
+
5
and perpendicular to the plane
5
x
+
3
y
−
6
z
+
8
=
0
is
Q.
If 5
x
+ 6
z
– 5
y
= 25 and
z
– 2
y
+ 2
x
= 3 (where
x
,
y
and
z
are real numbers), then the value of
x
−
y
z
is equal to
यदि 5
x
+ 6
z
– 5
y
= 25 तथा
z
– 2
y
+ 2
x
= 3 (जहाँ
x
,
y
व
z
वास्तविक संख्याएं हैं), तब
x
−
y
z
का मान है
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