Ответ:
[tex]\frac{10}{107}[/tex]
Пошаговое объяснение:
[tex]7,8a+5.04a-0.8=0.4\\\\7.8a+5.04a=0.4+0.8\\\\12.84a=1.2 |:12.84\\\\a=\frac{1.2}{12.84}\\\\a=\frac{120}{1284} \\\\a=\frac{10}{107}[/tex]
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Ответ:
[tex]\frac{10}{107}[/tex]
Пошаговое объяснение:
[tex]7,8a+5.04a-0.8=0.4\\\\7.8a+5.04a=0.4+0.8\\\\12.84a=1.2 |:12.84\\\\a=\frac{1.2}{12.84}\\\\a=\frac{120}{1284} \\\\a=\frac{10}{107}[/tex]