Respuesta:
[tex]5 \times - 3( \times - 4) = \\ 4( \times + 2) + 2(9 - 2 \times ) \\ 5 \times - 3 \times + 12 = 4 \times + 8 + 18 - 4 \times \\ 5 \times - 3 \times + 12 = 4 \times - 4 \times + 26 \\ 5 \times - 3 \times = 26 - 12 \\ 2 \times = 14 \\ \times = 14 |2 \\ \times = 7[/tex]
