Solve:
`(-8/13 + 3/7) + (-13/4) = (....) + [3/7 + (-13/4)]`

Solve : ((-5)/(13) + ((-2))/( 13)) + ((- 3)/(8) + (18)/(20))

Find the value of: (i) (-4) -: 2/3 (ii) (-3)/5 -: 2 (iii) (-4)/5 -: (-3) (iv) (-1)/8 -: 3/4 (v) (-2)/(13) -: 1/7 (vi) (-7)/(12) -: ((-2)/(13)) (vii) 3/(13) -: ((-4)/(65))

Solve (-7/12)+(-2/13)

Check if lines with direction-cosines : lt (12)/(13) , - (3)/(13) , - (4)/(13) gt , lt (4)/(13) , (12)/(13), (3)/(13) gt , lt (3)/(13) , (4)/(13) , (12)/(13) gt are mutually perpendicular .

Solve : (x)/(2) ge (5x -8)/(3)-(7x-13)/(5)

Solve |7 -2x| le 13

Solve : 4/(13)+2/(13)+1/(13)

Solve the following 7/13 + -9/13 = (--+(-9))/13 = (---)/13

12(1)/(3)+10(5)/(6)-7(2)/(3)-1(4)/(7)=?( a) 11(13)/(14) (b) 13(11)/(14)(c)13(13)/(14) (d) 14(11)/(13) (e) None of these