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4x'y, -3xy, -5xy, 5xy step by step
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1
Answer:
Here is the answer...
First take the second equation...
x
+
y
=
10
x
=
10
−
y
...
(
e
q
.
1
)
Now substitute
(
e
q
.
1
)
in the given equation
4
x
−
y
=
5
.
4
(
10
−
y
)
−
y
=
5
40
−
4
y
−
y
=
5
40
−
5
y
=
5
40
−
5
=
5
y
35
=
5
y
y
=
7
Substituting this value of
y
in
(
e
q
.
1
)
, we get
x
=
3
.
Therefore,
x
=
3
and
y
=
7
.
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