Question

alguien que me ayude por favor ​

Answer 1

Hola! :3

Resolvemos:

1) (4/3)+(2/7)=a

(4*7+3*2)/(3*7)=a

(28+6)/21=a

34/21=a

2) (3/4)+(5/9)=b

(3*9+4*5)/(4*9)=b

(27+20)/36=b

47/36=b

3) (2/9)+(2/6)=c

(2*6+2*9)/(9*6)=c

(12+18)/54=c

30/54=c

5/9=c

4) (6/7)+(3/4)=d

(6*4+7*3)/(7*4)=d

(24+21)/28=d

45/28=d

Espero haberte ayudado :D