Respuesta :

1xxhayitskayxx1

Answer:

a= -6

Step-by-step explanation:

Ver imagen 1xxhayitskayxx1

Answer:

a=-6

Step-by-step explanation:

6a+7=13+7a

subtract 7 from both sides

6a=13+7a-7

subtract 7a from both sides

6a-7a=13-7

add like terms

-a=6

divide by -1

a=-6