Question

395+x=864
Z+213=584
300-y206

Answer 1

395+x=864
x=864-395
x=469

Z+213=584
Z=584-213
Z=371

300-y=206
y=300-206
y=94

Answer 2

864-395=469; 395+469=864
584-213=371; 371+213=584
300-206=94;