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-7х+13х=13х-7. 3/5 Х7/9. 3х+5=9х-(5-2х). 9(Х+7)=-Х.
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5х 8 5х 1
5х 13
Х 4 5х 1
5х 2х2
5х 2у
5х 18
5х 4 7
Решите уравнение 5х 5х 6
1 5х 3 2
5х 6х