Пошаговое объяснение:
2х+30 + 5х+10= 180
7х =180-40
7х = 140
х =140: 7
х =20
/_АВС = 2 ×20+ 30 =70
/_ДМК = 5×20 +10 = 110
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Пошаговое объяснение:
2х+30 + 5х+10= 180
7х =180-40
7х = 140
х =140: 7
х =20
/_АВС = 2 ×20+ 30 =70
/_ДМК = 5×20 +10 = 110