Question

Equação do 1° grau ×+9=-1

Answer 1

x + 9 = -1
x = -1 -9
x = - 10

Answer 2

$\large\boxed{\begin{array}{l} \rm{x + 9 = - 1} \\ \rm{x = - 1 - 9} \\\huge\boxed{\boxed{\boxed{\boxed{\rm{x = - 10}}}}} \end{array}}$