Răspuns :
5a+76=348x2
5a=348x2-76
5a=696-76
5a=620
a=620:5
a=124
4a-a=231
3a=231
a=231:3
a=77
77x4=308
308-77=231
5a=348x2-76
5a=696-76
5a=620
a=620:5
a=124
4a-a=231
3a=231
a=231:3
a=77
77x4=308
308-77=231
5a+76=348x2
1)5a=348x2-76
5a=696-76
5a=620
a=620:5
a=124
2)4a-a=231
3a=231
a=231:3
a=77
77x4=308
308-77=231
1)5a=348x2-76
5a=696-76
5a=620
a=620:5
a=124
2)4a-a=231
3a=231
a=231:3
a=77
77x4=308
308-77=231