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Byju's Answer
Standard VII
Mathematics
Addition of Algebraic Expressions
x+y+z-100 n...
Question
x+y+z-100
= -2
xy+yz+zx
and x+y=3z
then find the value of z
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Solution
Dear student
G
i
v
e
n
x
+
y
+
z
-
100
=
-
2
.
.
.
.
.
(
!
)
a
n
d
.
x
+
y
=
3
z
.
.
.
.
.
(
2
)
S
u
b
s
t
i
t
u
t
e
t
h
e
v
a
l
u
e
o
f
x
+
y
=
3
z
i
n
e
q
(
1
)
,
w
e
g
e
t
3
z
+
z
-
100
=
-
2
⇒
4
z
=
98
⇒
z
=
98
4
⇒
z
=
49
2
R
e
g
a
r
d
s
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