Question

Gayatri
yatri Kumari
boll No.:
$x + y = 7 \\ x - y = 5 \\ if \: x = 3 \: then \: find \: the \: value \: of \: y$
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Answer 1

Answer:

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Answer 2

Answer:

substitute x= 3 in any of the equation

from equation 1

3 + y = 7

y = 7-3

y = 4

from equation 2

3 - y = 5

3 - 5 = y

y = -2

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