а)-2(х+5) + 1 = - 3(х +1)-2х - 10 + 1 = -3х - 3-2х - 9 = -3х - 3-2х + 3х = -3 +9х = 6======================-2(6+5) + 1 = -3(6+1)-22 + 1 = - 3 * 7-21 = -21б)0,8(9+2х) = 1 - 1 ¹/₂ *х7,2 + 1,6х = 1 - 1,5х1,6х + 1,5х = 1 - 7,23,1х = - 6,2х = -6,2 / 3,1х = - 2=======================0,8 (9+ 2 *(-2)) = 1 - 1 ¹/₂ * (-2)0,8 * (9 - 4) = 1 - ³/₂ * (-²/₁)0,8 * 5 = 1 + 34=4в)(х -4,5) / 2 = (-2х - 3,5) /33(х-4,5) = 2 *(-2х - 3,5)3х - 13,5 = -4х - 73х + 4х = -7+13,57х= 6,5х= 6,5/7 = 65/70 = 13/14х=¹³/₁₄======================(¹³/₁₄ - 4,5) / 2 = (-2 * ¹³/₁₄ - 3,5) / 3(¹³/₁₄ - ⁹/₂) / 2 = ( - ²⁶/₁₄ - ⁷/₂) /3(¹³/₁₄ - ⁶³/₁₄) / 2 = ( - ²⁶/₁₄ - ⁴⁹/₁₄) /3- ⁵⁰/₁₄ * ¹/₂ = - ⁷⁵/₁₄ * ¹/₃- ²⁵/₁₄ = - ²⁵/₁₄- 1 ¹¹/₁₄ = - 1 ¹¹/₁₄г)|x| - 15 = 9 - 5 * |x|x≥0 x - 15 = 9 - 5xx +5x = 9 + 156x = 24x=24/6x₁ = 4x<0-x -15 = 9 - 5 *(-x)-x - 15 = 9 +5x-x - 5x = 9 + 15-6x = 24x= 24/(-6)x₂ = - 4