Question

qual a resposta 10 = x + 9

Answer 1

$10 = x + 9$

$- x = 9 - 10$

$- x = - 1 \: \: \: . \: ( - 1)$

$\boxed{x = 1}$

Att. NLE Top Shotta

Answer 2

resposta 1

(+)com (+)=+

(-) com(-)= +

(+) com(-)= -

(-) com(+)= -

____________________________

10= x + 9

x+9=10

x=10-9

x=1