[" Vescity that "-(-x)" is the same as "x" for "],[x=(13)/(7)],[x=(-21)/(31)]

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

Verify that (-x) is the as x for (i) x=(13)/(17) (ii) x=(-21)/(31)

Verify that – (– x) is the same as x for : x=13/17

Verify that (-x) is the as x for (i) x = (13)/(17) (ii) x = (- 21)/(31)

Verify that :-(-x) = x for x = -21/31

Find the value of x , if x = 5/7 - (-6/21)

Numbers of real roots of ((5)/(13))^(x)+(21)/(13)=2^(x)

If coefficient of x^(21) in the expansion of (1 + x)^(21) + (1 + x)^(22) + ... + (1 + x)^(30) is ""^(31)C_(r) , where r ge 20 , then r= ___

Find the value of x + y , if 12x+13y=29 and 13x+12y=21

If 3y + 3 = 7x , then 21y - 49 x =