Question

evaluate by properties of addition of rational numbers

3/7+-4/9+-11/7+7/9 ​

Answer 1

Answer:

Answer will be -17 / 21

hope it helps you dude

Answer 2

Answer:

3

Step-by-step explanation:

(3/7+11/7) + (4/9+7/9) = 14/7 + 11/9

After equivilating the denominators -

$\frac{126+77}{63}$ = 203/63 [∵ both are factors of 7]

          = 27/9 [ ∵ both are factos of 9]

          =  3