Question

Halla "x"
442 (4) 213
537 (7) 341
927 (x) 554

Answer 1

4+4+2=10;2+1+3=6; 10-6=4
5+3+7=15; 3+4+1=8; 15-8=7
9+2+7=18; 5+5+4=14 ; 18-14=4
X=4

Answer 2

(4+4+2)-(2+1+3)=4
(5+3+7)-(3+4+1)=7
(9+2+7)-(5+5+4)=4
respuesta :4