Вопрос:

Решите линейные уравнения: 2x - 3(x - 3) = 12, 18 - 5(9 - x) = 8 и другие.

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Ответ ассистента

**Ответы:** 1) $2x - 3(x - 3) = 12$ $2x - 3x + 9 = 12$ $-x = 12 - 9$ $-x = 3$ $x = -3$ 2) $18 - 5(9 - x) = 8$ $18 - 45 + 5x = 8$ $5x - 27 = 8$ $5x = 35$ $x = 7$ 3) $-x = 4 - 3(3x - 8)$ $-x = 4 - 9x + 24$ $-x + 9x = 28$ $8x = 28$ $x = 3,5$ 4) $2x - 3(x + 3) = -5$ $2x - 3x - 9 = -5$ $-x = 9 - 5$ $-x = 4$ $x = -4$ 5) $10(2 - x) + 11x = -3x$ $20 - 10x + 11x = -3x$ $x + 3x = -20$ $4x = -20$ $x = -5$ 6) $19 + x = 4(x - 3) + 7$ $19 + x = 4x - 12 + 7$ $x - 4x = -5 - 19$ $-3x = -24$ $x = 8$ 7) $4(14 + 4x) - 3x = 6x$ $56 + 16x - 3x = 6x$ $13x - 6x = -56$ $7x = -56$ $x = -8$ 8) $6(3x + 1) - 3x = 11x$ $18x + 6 - 3x = 11x$ $15x - 11x = -6$ $4x = -6$ $x = -1,5$ 9) $11 - 5x = 2(3 - 4x) - 16$ $11 - 5x = 6 - 8x - 16$ $-5x + 8x = -10 - 11$ $3x = -21$ $x = -7$ 10) $(7x - 8) - (2x - 5) = 17$ $7x - 8 - 2x + 5 = 17$ $5x - 3 = 17$ $5x = 20$ $x = 4$

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