Răspuns:
3(2x+1)-7=26
3(2x+1)=26+7
3(2x+1)=33
2x+1=33:3
2x+1=11
2x=11-1
2x=10
x=10:2
x=5
2(5x+7)=114
5x+7=114:2
5x+7=57
5x=57-7
5x=50
x=50:5
x=10
6x+3=26+7
6x+3=33
6x=33-3
6x=30
x= 30:6
x= 10
