(3d-1)/20+4=d/10
3d-1+80=2d
d=-79
Обе части уравнения умножаем на 20:
3х-1+80=2х
3х+79=2х
3х-2х=-79
х=-79
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(3d-1)/20+4=d/10
3d-1+80=2d
d=-79
Обе части уравнения умножаем на 20:
3х-1+80=2х
3х+79=2х
3х-2х=-79
х=-79