Răspunsuri

2014-11-18T16:54:45+02:00
 Mai intai separam termenii
15x+3=378
15x=378-3
15x=375
x=375/15
x=25
cei cu 2x,3y,3z ii punem in stanga iar cei fara in dreapta si cu sens schimbat
2014-11-18T16:54:48+02:00
Ecuatie  15x = 378 - 3 ⇔  15x = 375  ⇔ x = 375 : 15  ⇔ x = 25