100-30-c= x+20+15=90 a+(34+26)=100 y+20=80-(40+5) - вопрос №36692471003020159034261002080405 от dashamaltseva64 16.03.2022 02:21

Question

Математика: 100-30-c= x+20+15=90 a+(34+26)=100 y+20=80-(40+5)

dashamaltseva64 · Answer

100 - 30 - c = 2070 - c = 20c = 70 - 20c = 50x + 20 + 15 = 90х + 35 = 90х = 90 - 35х = 55а + (34 + 26) = 100а + 60 = 100а = 100 -60а = 40у + 20 = 80 - (40  + 5)у + 20 = 80 - 45у + 20 = 35у = 35 - 20у = 15...