3 (2х+5)/8-2 (5х+7)/4=7 (х-15)/4-6 7/8. Created by nazanagul. matematika-ru

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3 (2х+5)/8-2 (5х+7)/4=7 (х-15)/4-6 7/8

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ник3709 Обе части уравнения почленно умножим на 8, тогда получим:
3(2х+5)-4(5х+7)=14(х-15)-55;
6х+15-20х-28=14х-210-55;
6х-20х-14х=-210-55-15+28;
-28х=-252;
х=252÷28; х=9.

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