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Автор - gaogui

Помогите решить уравнения!
а) 2,4 +  frac{1}{5} х = 1 frac{1}{15} х + 1,56
б) 5 (y + 2)= 9у - 6( у-1)

Ответ

Проверено экспертом

Автор - nafanya2014
a) 2,4 + frac{1}{5}x  = 1 frac{1}{15}x + 1,56 \  \  frac{1}{5}x  - 1 frac{1}{15}x=1,56-2,4 \  \  frac{3}{15}x  -  frac{16}{15}x=-0,84 \  \ - frac{13}{15}x= - frac{21}{25}  \  \ x=frac{21}{25}cdot frac{15}{13} \  \ x= frac{63}{65}  <br />

б) 5 (y + 2)= 9у - 6( у-1)
5у+10=9у-6у+6
5у-9у+6у=6-10
3у=-4
у=-4/3
у=-1 целая 1/3

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