Question

solve the following pair of equation by reducing them to a pair of linear equation
(vii)
10 2
+
=4
x + y X-y
15 5
=-2
xty x- y​

Answer 1

Answer:

Let

x+y

1

=u&

x−y

1

=v

then

(10u+2v=4)3

(15u−5v=−2)2

10u+2=4

u=

5

1

−(30u−10v=−4)

__________________

16v=16

__________________

v=1;u=

5

1

=0.2

x+y

1

=

5

1

;x+y=5

x−y

1

=1;x−y=1

x+y=5

x−y=1

_________

2x=6

_________

x=3&y=2

Step-by-step explanation:

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