Respuesta :

semsee45

Answer:

[tex]a=\dfrac{7}{10}[/tex]

Step-by-step explanation:

[tex]a+\dfrac45=1\dfrac12\\\\\implies a+\dfrac45=\dfrac32\\\\\implies a=\dfrac32-\dfrac45\\\\\implies a=\dfrac{15}{10}-\dfrac{8}{10}\\\\\implies a=\dfrac{7}{10}[/tex]