Question

Urgent dau coroană! ¡!!!!!!!!!!!!!!!!!! ​

Answer 1

Răspuns:

a+b=45+12 supra 54=67 supra 54

a-b=45-12 supra 54=33 supra 54

a=13/6

a+b=3=>b=3-13/6=>b=5/6

a-b=13/6-5/6=12/6=2

a=7/8

a-b=12=>b=7/8-12=>b=7/8-96/8=>b=-89/8

a+b=7/8-89/8=82/8=41/4

b=13/12

a-b=2/3=>a=2/3+13/12=>a=8/12+13+12=>a=21/12

a+b=21/12+13/12=34/12=17/6