х-одна часть
2х+3х = 45
5х = 45
х = 9
2*9 = 18, 3*9 = 27
45 = 18+27
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х-одна часть
2х+3х = 45
5х = 45
х = 9
2*9 = 18, 3*9 = 27
45 = 18+27