Afla numarul necunoscut
30 x 6 : a + 92 x 5 - 36 x 11 = 84


Răspuns :

30×6:a+92×5-36×11=84
30×6:a+460-396=84/+396
30×6:a+460=480/-460
180:a=20/:20
a=9
sper ca e de folos
30×6:a+92×5-36×11=84
180:a+92×5-36×11=84
180:a+460-396=84
180:a+460=84+396
180:a+460=480
180:a=480-460
180:a=20
a=180:20
a=9


Răspuns : 9


Verificare :
30×6:9+92×5-36×11=84


SUCCES !