1)8х + 5.9 = 7х + 208х - 7х = 20 - 5.9х = 14.12)6х - 8 = -5х - 1.66х + 5х = 8 - 1.611х = 6.4х = 0.583)15у - 8 = - 6у + 4.615у + 6у = 8 + 4.621у = 12.6у = 0.64)16z + 1.7 = 2z - 116z - 2z = - 1.7 - 114z= - 1.8z = - 0.125)6x - 12 = 5x + 46x - 5x = 12 + 4x = 166)- 9a + 8 = - 10a - 2- 9a + 10a = - 8 - 2a = -107)7m + 1 =8m + 97m - 8m = -1 + 9- m = 8m = -88)- 12n - 3 = 11n - 3- 12n - 11n = 3 - 3- 23n = 09)4 + 25y = 6 + 24y4 - 6 = - 25y + 24y- 2 = -yy = 210)11 - 5z = 12 - 6z- 5 + 6z= - 11 + 12z = 1