Автор - saryan168330

реши уравнения 15:(8-x)+9=12, (8× x-140):6=30, x;9+8=12,5×(15-x)-7=28

Ответ

Автор - elizavetkashar
15:(8-х)+9 = 12
15:(8-х)=12-9
15:(8-х)=3
8-х=15:3
8-х=5
х=8-5
х=3

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