17. The solution of x+y=5 and 2x-y=4 is
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Explanation:
x
+
y
=
5
2
x
−
y
=
4
Adding up the above equations we get
x
+
2
x
+
y
−
y
=
5
+
4
or
3
x
+
0
=
9
or
3
x
=
9
or
x
=
9
3
or
x
=
3
=========Ans
1
So From equation
x
+
y
=
5
we get
3
+
y
=
5
or
y
=
5
−
3
or
y
=
2
=========Ans
2
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