Răspuns :
3*(2x+1) = 32+1
3*(2x+1) = 33
2x+1 = 33:3
2x+1 = 11
2x= 11-1
2x= 10
x= 10:2
x= 5
Verificare 3*(2*5+1)-1 = 3*(10+1)-1 = 3*11-1 = 33-1 = 32.......
3·(2x + 1) - 1 = 32 ⇔ 6x + 3 - 1 = 32 ⇔ 6x = 32 + 1 - 3 ⇔ 6x = 30 ⇔ x = 5
3*(2x+1) = 32+1
3*(2x+1) = 33
2x+1 = 33:3
2x+1 = 11
2x= 11-1
2x= 10
x= 10:2
x= 5
Verificare 3*(2*5+1)-1 = 3*(10+1)-1 = 3*11-1 = 33-1 = 32.......
3·(2x + 1) - 1 = 32 ⇔ 6x + 3 - 1 = 32 ⇔ 6x = 32 + 1 - 3 ⇔ 6x = 30 ⇔ x = 5