Question

g) 15 = x + 20 ? ajuda ​

Answer 1

15 = x + 20

-x = 20 - 15

-x = 5

x = -5

\boxed{x = -5}

x=−5

Answer 2

$\sf \: 15 = x + 20 \\ \sf \: - x = 20 - 15 \\ \sf \: - x = 5 \\ \sf \: - x = 5 \cdot( - 1) \\ \sf \: \boxed{\sf \: x = - 5}$

Att: Nerd1990