Question

7 for x+y=a and x-y=b, what is a+b?
a) 2x
b) 24
c) 0​

Answer 1

Answer:

given : x+y = a and x-y = b

find:a+b =?

sol: (x+y) + (x-y)

=> x + y + x - y

=> 2x

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Answer 2

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a) 2x .

$x + y = a \: and \: x - y = b \\ \: for \: a + b \: \\ \implies(x + y) + (x - y) = 2x$