Примеры(Записать только ответы)
2х+7х+3у =
5х-2+3у-5х =
2у+8х+2х+у =
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Уравнения(Записать всё решение)
1) 75:а = 3
2) 6х+х=42
3)5х+5=20
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15 баллов.
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