Question

13-x=-7; -13-x=-7;
-56-x=0; (12+x)+20=-32;

Answer 1

$13 - x = - 7 \ - x = - 7 - 13 \ - x = - 20 \ x = 20$
$- 13 - x = - 7 \ - x = - 7 + 13 \ - x = 6 \ x = - 6$
$- 56 - x = 0 \ - x = 56 \ x = - 56$
$(12 + x) + 20 = - 32 \ 12 + x + 20 = - 32 \ x = - 32 - 12 - 20 \ x = - 64$

Answer 2

13-x=-7 -13-x=-7
-x=-20 -x=6
x=20 x=-6



-56-x=0
-x=56
x=-56


(12+x)+20=-32
12+x=-52
x=-64