478-(256+x)=143 659-(345-x)=427 791-(x-298)=683

Question

478-(256+x)=143

659-(345-x)=427

791-(x-298)=683

Answer 1

256+х=478+143
256+х=621
х=365

345-х=659-427
345-х=232
х=345-232
х=113

х-298=791-683
х-298=108
х=298+108
х=406