Помогите пожалуйста номер 153 (3,4).

1) 5.6 * 3 = 0.4 * (3x + 12) 16.8 = 1.2x + 4.8 1,2x = 16.8 - 4.8 1,2x = 12 x = 12 : 1,2 x = 10 ________ 2) 8.7 * 2 = 0.5 * (15 + 4x) 17.4 = 7.5 + 2x 2x = 17,4 - 7.5 2x = 9.9 x = 9.9 : 2 x = 4,95 _______ 3) 1,2 * (3x + 1,6) = 5 * 2,4 3,6x + 1,92 = 12 3,6x = 12 - 1,92 3,6x = 10,08 x = 10,08 : 3,6 x = 2,8 __________________ 4) 5,4 * (4,7x - 4,2) = 3 * 0,9 25,38x - 22,68 = 2,7 25,38x = 2,7 + 22,68 25,38x = 25,38 x = 25,38 : 25,38 x = 1 ___________________