Решите уравнения :
18х=-6
7/8х=21
2х-1=3х+99
(7-2х)-3(5х-2)=47
3(х-1)-2(х-6)=4-(х+3)
Решите уравнение свойством пропорции :
7х/5=2+х/9
Помогитееее ;-;
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