Question

EGRE LUCI
35. (x + y = 100 and (x-y=16. then find out the value of
x
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Answer 1

add the equation 1 and 2

x + y = 100............(1)

x - y. = 16...............(2)

2x = 116

therefore, x = 58

put the value of x in any eq. 1 or 2

i put in eq. 1

58 - y = 100

- y = 100 - 58

- y = 42

y = - 42

x = 58 , y = - 42............(ans.)