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Ответ

Ответ дан
alex080297

Ответ:

Объяснение:

frac{3}{5x} =frac{15}{1} \75x=3\x=frac{3}{75} =frac{1}{25}=0.04

8x+7=13\8x=13-7\8x=6\x=frac{6}{8} =frac{3}{4} =0.75

3y-5=-14\3y=-14+5\3y=-9\y=-3

frac{2}{3y} =frac{12}{1}\36y=2\y=frac{2}{36} =frac{1}{18}

Ответ

Ответ дан
emma335

Ответ:

А) х = 25

Б) х = 0,75

В) y = - 3

Г) y = 18

Объяснение:

А)

3 div 5x = 15 \  frac{3}{5} x = 15 \  frac{3}{5} x = 15  times  frac{5}{3}   \ x = 25

Б)

8x + 7 = 13 \ 8x = 13 - 7 \ x = 6 div 8 \ x =  frac{3}{4}  \ x = 0.75

В)

3y - 5 = - 14 \ 3y =  - 14  + 5 \ 3y =  - 9 div 3 \ y =  - 3

Г)

2 div 3y = 12 \  frac{2}{3} y = 12  times 2 \ y = 18

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