Question

Verify that – (– x) is the same as x for x = -31/21

Answer 1

Answer:

see now -(-x) becomes +x

so now we need to take x as-31/21

so -x becomes 31/21

so -(-x) implies -(31/21) which is the same value as x

Answer 2

Answer:

-(-x)

x = -31/21

-(-x) = -[-(-31/21)]

       = -31/21

       = x

Hope this helps! By the way same question was in my book too.

Explanation: