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Ответ

Ответ дан
brodyagatom

Ответ:

а) х = 4

б) х = 22/7 или х = 3 целых 1/7

Пошаговое объяснение:

А)

2x+5=9+x

2х - х = 9 - 5

х = 4

Б)

7/8 x = 1 1/4

х = 11/4 разделить на 7/8

х = 11/4 * 8/7

х = 11*8 / 4*7

х = 11*2 / 1*7

х = 22/7

х = 3 целых 1/7

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