Реши уравнения: a) 2x+9=13-x

Конечно, решим уравнения! Вот ответы: a) $2x + 9 = 13 - x$ $2x + x = 13 - 9$ $3x = 4$ $x = \frac{4}{3}$ $x = 1\frac{1}{3}$ б) $14 - y = 19 - 11y$ $-y + 11y = 19 - 14$ $10y = 5$ $y = \frac{5}{10}$ $y = 0.5$ в) $0.5a + 11 = 4 - 3a$ $0.5a + 3a = 4 - 11$ $3.5a = -7$ $a = \frac{-7}{3.5}$ $a = -2$ г) $1.2n + 1 = 1 - n$ $1.2n + n = 1 - 1$ $2.2n = 0$ $n = 0$ д) $1.7 - 0.3m = 2 + 1.7m$ $-0.3m - 1.7m = 2 - 1.7$ $-2m = 0.3$ $m = \frac{0.3}{-2}$ $m = -0.15$ е) $0.8x + 14 = 2 - 1.6x$ $0.8x + 1.6x = 2 - 14$ $2.4x = -12$ $x = \frac{-12}{2.4}$ $x = -5$ ж) $15 - p = \frac{1}{3}p - 1$ $-p - \frac{1}{3}p = -1 - 15$ $-\frac{3}{3}p - \frac{1}{3}p = -16$ $-\frac{4}{3}p = -16$ $p = -16 \cdot (-\frac{3}{4})$ $p = 12$ з) $1\frac{1}{3}x + 4 = \frac{1}{3}x + 1$ $\frac{4}{3}x - \frac{1}{3}x = 1 - 4$ $\frac{3}{3}x = -3$ $x = -3$ и) $z - \frac{1}{2}z = 0$ $\frac{1}{2}z = 0$ $z = 0$ к) $x - 4x = 0$ $-3x = 0$ $x = 0$ л) $x = -x$ $x + x = 0$ $2x = 0$ $x = 0$ м) $5y = 6y$ $5y - 6y = 0$ $-y = 0$ $y = 0$