Răspuns :
2x+3=×+12 2x-x=12-3 x=9
7x=2x+20 7x-2x=20 x=20÷5=4
5x-2=4x+10 5x-4x=10+2 x=12
2x-2=x+7 2x-x=7+2 x=9
7x=2x+20 7x-2x=20 x=20÷5=4
5x-2=4x+10 5x-4x=10+2 x=12
2x-2=x+7 2x-x=7+2 x=9