Пошаговое объяснение:
(542-t)-130=204
542 - t = 204 + 130
542 - t = 334
t = 542 - 334
t = 208
927-(267+n)=349
267 + n = 927 - 349
267 + n = 578
n = 578 - 267
n = 311
98-((45+ n)-38)=48
45 + n - 38 = 98 - 48
7 + n = 50
n = 50 - 7
n = 43
