Question

vă rog faceți b)
am nevoie urgent​

Answer 1

Răspuns:

x=7/5

Explicație pas cu pas:

3,(4)+0,(5)-2,(7)·x=0,(1)  ⇒34-3/9+5/9-x·(27-2)/9=1/9  ⇒

31/9+5/9-x·25/9=1/9  ⇒31/9+5/9-1/9=x·25/9  ⇒31+5-1=x·25  ⇒35=x·25  ⇒7=x·5  ⇒x=7/5

Proba: 31/9+5/9-(25/9)·(7/5)=1/9   36/9-(25·7)(9·5)=1/9  ⇒36/9-35/9=1/9  ⇒1/9=1/9