помогите решить примеры
2) 9(5х+13)-143=109
3) 15(13х-7)-191=94
5) (2х+39)/5=13
Пример-7(х+8)-25=66
7х+56-25=66
7х=66-56+25
7х=35
х=35/7
х=5
---------------------------------------------
7(5+8)-25=66
           66=66
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