Ответ:
x = 10/3
Пошаговое объяснение:
(x + 3) + ((x+3)×2) = 19
x + 3 + (2x + 6) = 19
x + 3 + 2x + 6 = 19
3x + 9 = 19
3x = 19 - 9
3x = 10
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Ответ:
x = 10/3
Пошаговое объяснение:
(x + 3) + ((x+3)×2) = 19
x + 3 + (2x + 6) = 19
x + 3 + 2x + 6 = 19
3x + 9 = 19
3x = 19 - 9
3x = 10
x = 10/3