Find the sum
`(a) 3/7+2/7`
`(b) 7/9+1/9`

Find the sum 1 2/7+3/7+2 5/7

Find the value of -3/7+9/7

Find the sum: 1/9+4/9+7/9

Find the sum: 5/9+\ 6+1 5/7

Find the sum (7)/(12)+(9)/(16)

If 7x + 3y + 9 = 0 and y = kx + 7 are two parallel lines then find the value of k. (a)9/7 (b)-7/3 (c)5/8 (d)6/5

Find the value of 7/9 - 1/3

Without adding find the sum: (1+ 3+5 +7 +9) (1+3+5+7+9+11+13+15+17)

Using suitable rearrangement and find the sum: (4)/(7) +((-4)/(9)) +(3)/(7) +((-13)/(9))

Find the sum : (-7)+(-9)+4+(-10)