(х+27)-2= 42
х + 25 = 42
х = 17
115-(35+х)=39
115-35-х=39
х= 115-35-39
х = 41
х-35-64=16
х = 16+35+64
х=115
28-х+35=53
х=28+35-53
х=10
(х+27)-2= 42
х + 25 = 42
х = 17
115-(35+х)=39
115-35-х=39
х= 115-35-39
х = 41
х-35-64=16
х = 16+35+64
х=115
28-х+35=53
х=28+35-53
х=10