1) 2x+8=6x-2, 2) 10y+3=2y-1, 3) -4+3к=8к+5. 4) 9+4a=8a-9, 5) 3в+9=8в+2, 6) 6-2c=3c-10, 7) 5-2y=8y+9, 8) -4x+3=4x-5, 9) 4a+4=-6a-5. 10) -5-(0,8t-1,2)=-t+7,2, 11) -5-(3a+1)-11=-16, 12) -3,2n+4,8=-2·(1,2n+2,4),

Решение уравнений:

1) 2x + 8 = 6x - 2 8 + 2 = 6x - 2x 10 = 4x x = 10 / 4 x = 2.5 2) 10y + 3 = 2y - 1 10y - 2y = -1 - 3 8y = -4 y = -4 / 8 y = -0.5 3) -4 + 3k = 8k + 5 3k - 8k = 5 + 4 -5k = 9 k = -9 / 5 k = -1.8 4) 9 + 4a = 8a - 9 4a - 8a = -9 - 9 -4a = -18 a = -18 / -4 a = 4.5 5) 3b + 9 = 8b + 2 3b - 8b = 2 - 9 -5b = -7 b = -7 / -5 b = 1.4 6) 6 - 2c = 3c - 10 -2c - 3c = -10 - 6 -5c = -16 c = -16 / -5 c = 3.2 7) 5 - 2y = 8y + 9 -2y - 8y = 9 - 5 -10y = 4 y = 4 / -10 y = -0.4 8) -4x + 3 = 4x - 5 -4x - 4x = -5 - 3 -8x = -8 x = -8 / -8 x = 1 9) 4a + 4 = -6a - 5 4a + 6a = -5 - 4 10a = -9 a = -9 / 10 a = -0.9 10) -5 * (0.8t - 1.2) = -t + 7.2 -4t + 6 = -t + 7.2 -4t + t = 7.2 - 6 -3t = 1.2 t = 1.2 / -3 t = -0.4 11) -5 * (3a + 1) - 11 = -16 -15a - 5 - 11 = -16 -15a - 16 = -16 -15a = -16 + 16 -15a = 0 a = 0 / -15 a = 0 12) -3.2n + 4.8 = -2 * (1.2n + 2.4) -3.2n + 4.8 = -2.4n - 4.8 -3.2n + 2.4n = -4.8 - 4.8 -0.8n = -9.6 n = -9.6 / -0.8 n = 12

Ответ: решения уравнений выше

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