Question

verify that -(-x) is same as x for : a). x= 13/7 b). x= -21/31​

Answer 1

Step-by-step explanation:

when x = 13/7

-(-x) = -(-13/7)

= 13/7 = x

hence, x = -(-x)

when x = -21/31

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

= -21/31 = x

hence, , x = -(-x)

Answer 2

Case 1

-(-x)=-(-13/7)

$\bf{ \boxed{ \green{ \mapsto{ - ( - x) = \frac{13}{7} }}}}$

which is the same as x...

Case 2

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

$\bf{ \boxed{ \orange{ \mapsto{ - ( - x) = \frac{ - 21}{31} }}}}$

which is the same as x...

Moreover, we have,

-(-x)=x (since, – × – = +)

so, it is same as the value of x...

Hope it helps you...

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