Предмет: Алгебра,
автор: Аноним
решите.....................
Приложения:
![](https://files.topotvet.com/i/46c/46c4e15dc33abffa186455d01b523092.jpg)
Ответы
Автор ответа:
1
Номер 1.
а)
![6p + 8q - 9p - 3q = 5q - 3p 6p + 8q - 9p - 3q = 5q - 3p](https://tex.z-dn.net/?f=6p+%2B+8q+-+9p+-+3q++%3D+5q+-+3p)
б)
![7y + (4 - 2y) - (12 + 9y) = \\ = 7y + 4 - 2y - 12 - 9y = \\ = - 4y - 8 7y + (4 - 2y) - (12 + 9y) = \\ = 7y + 4 - 2y - 12 - 9y = \\ = - 4y - 8](https://tex.z-dn.net/?f=7y+%2B+%284+-+2y%29+-+%2812+%2B+9y%29+%3D++%5C%5C++%3D+7y+%2B+4+-+2y+-+12+-+9y+%3D++%5C%5C++%3D++-+4y+-+8)
в)
![2 - 6(7x + 3) = 2 - 42x - 18 = \\ = - 16 - 42x 2 - 6(7x + 3) = 2 - 42x - 18 = \\ = - 16 - 42x](https://tex.z-dn.net/?f=2+-+6%287x+%2B+3%29+%3D+2+-+42x+-+18+%3D++%5C%5C++%3D++-+16+-+42x)
Номер 2.
а)
![7x + 43.4 = 0 \\ 7x = - 43.4 \\ x = - 6.2 7x + 43.4 = 0 \\ 7x = - 43.4 \\ x = - 6.2](https://tex.z-dn.net/?f=7x+%2B+43.4+%3D+0+%5C%5C+7x+%3D++-+43.4+%5C%5C+x+%3D++-+6.2)
б)
![3(0.8x + 1.7) - 3.1 = 2.6x \\ 2.4x + 5.1 - 3.1 = 2.6x \\ 2.4x - 2.6x = 3.1 - 5.1 \\ 0.2x = - 2 \\ x = - 10 3(0.8x + 1.7) - 3.1 = 2.6x \\ 2.4x + 5.1 - 3.1 = 2.6x \\ 2.4x - 2.6x = 3.1 - 5.1 \\ 0.2x = - 2 \\ x = - 10](https://tex.z-dn.net/?f=+3%280.8x+%2B+1.7%29+-+3.1+%3D+2.6x+%5C%5C+2.4x+%2B+5.1+-+3.1+%3D+2.6x+%5C%5C+2.4x+-+2.6x+%3D+3.1+-+5.1+%5C%5C+0.2x+%3D++-+2+%5C%5C+x+%3D++-+10)
а)
б)
в)
Номер 2.
а)
б)
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