Вдвух рулонах 58 м. ткани причом в первом на 28 м. ткани б. ,чем во втором . сколько м. ткани в каждом рулоне ?
Soulwax
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01.06.2019 16:10
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2
2) 30 : 3 = 15 м в одном рулоне
3) 15 + 28 = 43 м в другом рулоне
х-28 - ткани во втором
всего - 58
х+х-28=58
2х=58 +28
2х=86
х=86/2
х=43м - в первом
43-28 =15 - во втором