(163 - х) - 117 = 0
(456 + 112) - x = 400
145 - (х + 45) = 50
x - (203 + 303) = 34
(39 + х) - 27 = 22
468 - 217 - х = 51

163-x-117=0x=163-117x=46456+112-x=400x=456+112-400x=168145-x-45=50x=145-45-50x=50x-203-303=34x=34+203+303x=54039+x-27=22x=22-39+27x=10468-217-x=51x=468-217-51x=200