Răspuns :
[tex] a = \: \: \: \frac{2x + 1}{5x + 19} \: \: \times 2 \: \: \: \: \frac{2x + 1}{2x + 1} \times 5 \\ \\ \frac{2x + 1}{10x + 33} \: \: \: \: \frac{2x + 1}{10x + 5} ( - ) \: \\ \\ = > \: \frac{2x + 1}{38} \: \: \: \: \: 2x + 1 = (1.11.33. - 1. - 11. - 33) \\ \\ 2x = (0.10.32. - 2. - 12. - 34) \\ x = (0.5.16. - 1. - 6. - 17)[/tex]
Punctul inseamna virgula, iti zic ca sa nu te incurci.
[tex] b = \: \: \frac{2x - 1}{7x + 10} \times 2 \: \: \: \: \: \: \: \frac{2x - 1}{2x - 1 } \times 7 \\ \\ \frac{2x - 1}{14x + 20} \: \: \: \: \frac{2x - 1}{14x - 7} \: \: ( - ) \\ \\ \frac{2x - 1}{27} \\ \\ 2x - 1 = (1.3.9.27. - 1. - 3. - 9. - 27) + 1 \\ 2x = (2.4.10.28.0. - 2. - 8. - 26) \\ x = (1.2.5.14.0. - 14.0. - 1. - 4. - 13)[/tex]
Sper sa te ajute.