Răspuns :
3(2x+8)=48
6x+24=48
6x=48-24
6x=24
x=24:6
x=4
7y-9=5y+33
7y-5y=33+9
2y=42
y=42:2
y=21
6x+24=48
6x=48-24
6x=24
x=24:6
x=4
7y-9=5y+33
7y-5y=33+9
2y=42
y=42:2
y=21
7y-9=5y+33 simplificam (7y-5y)-9=33 2y-9=33 2y=33-9 2y=24 y=24:2 y=12