Уравнение 115-(35+y)=39 z-35-64=16 28-t+35=53
115-(35+y)=39 115-35-y=39 -y=39-115+35 -y=-41 y=41 ================== z-35-64=16 z=16+35+64 z=115 ============= 28-t+35=53 -t=53-28-35 -t=-10 t=10