Question

x+5=8
x+9=1
x-4=3
x-39=-79​

Answer 1

Resposta:

3, -8, 7, 40.

Answer 2

$x+5=8\\x=8-5\\x=3\\\\x+9=1\\x=1-9\\x=-8\\\\x-4=3\\x=3+4\\x=7\\\\x-39=-79\\x=-79+39\\x=40$

:)