Ayudaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

Respuesta:
a=11
Explicación paso a paso:
[tex]7a + 2 = 5a + 24 \\ 7a + 2 - 5a = 24 \\ 7a - 5a = 24 - 2 \\ 2a = 22 \\ a = \frac{22}{2} \\ a = 11[/tex]