... ecuatiei:
2x + 2x+3 = 36
2x + 2x+3 = 36 <=> 2x + 2x * 23 = 36. Facem notatia 2x = y si obtinem:
y + 8y = 36 <=> 9y = 36 <=> y = 4
Revenind la notatia initiala obtinem solutia x = 2