Реши уравнения: a) 3,8x - (1,6-1,2x) = 9,6 + (3,7-5x)

a) $3.8x - (1.6 - 1.2x) = 9.6 + (3.7 - 5x)$ $3.8x - 1.6 + 1.2x = 9.6 + 3.7 - 5x$ $3.8x + 1.2x + 5x = 9.6 + 3.7 + 1.6$ $10x = 14.9$ $x = 1.49$ б) $(4.5y + 9) - (6.2 - 3.1y) = 7.2y + 2.8$ $4.5y + 9 - 6.2 + 3.1y = 7.2y + 2.8$ $4.5y + 3.1y - 7.2y = 2.8 - 9 + 6.2$ $0.4y = 0$ $y = 0$ в) $0.6m - 1.4 = (3.5m + 1.7) - (2.7m - 3.4)$ $0.6m - 1.4 = 3.5m + 1.7 - 2.7m + 3.4$ $0.6m - 3.5m + 2.7m = 1.7 + 3.4 + 1.4$ $-0.2m = 6.5$ $m = -32.5$ г) $(5.3a - 0.8) - (1.6 - 4.7a) = 2a - (a - 0.3)$ $5.3a - 0.8 - 1.6 + 4.7a = 2a - a + 0.3$ $5.3a + 4.7a - 2a + a = 0.3 + 0.8 + 1.6$ $9a = 2.7$ $a = 0.3$ **Ответ:** a) $x = 1.49$, б) $y = 0$, в) $m = -32.5$, г) $a = 0.3$