Ответ:
Пошаговое объяснение:
9 - 6(u - 1) = u + 15
9 - 6u + 6 = u + 15
15 - 6u = u + 15
u + 6u = 15 - 15
7u = 0
u = 0
=============
12(x - 2) + 3x = 1/2(x + 6) + 2
12x - 24 + 3x = 0,5x + 3 + 2
12x + 3x - 0,5x = 3+2+24
14,5x = 29
x = 29 : 14,5
x = 2
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Ответ:
Пошаговое объяснение:
9 - 6(u - 1) = u + 15
9 - 6u + 6 = u + 15
15 - 6u = u + 15
u + 6u = 15 - 15
7u = 0
u = 0
=============
12(x - 2) + 3x = 1/2(x + 6) + 2
12x - 24 + 3x = 0,5x + 3 + 2
12x + 3x - 0,5x = 3+2+24
14,5x = 29
x = 29 : 14,5
x = 2