462 на завтра дам 10 бал
1. (х+27)-12=42 2.115-(35+у)=39 3. z-35-64=16 4.28-t+35=53 х+27=42+12 -35-у=39-115 z-99=16 -t+63=53 х+27=54 -35-у=-76 z=16+99 -t=53-63=-10 х=54-27=27 -у=-76+35=-41 z=115 t=10 у=41
1) 24+12=54. 3)16+64 =80 54 - 27 = 27 80 + 35 = 115 х = 27 х = 115 2)115-39 = 76. 4)28+35 = 63 76-35 = 41. 63-53 = 10 х = 41 х=10