1) 2(5x-3) = 010x - 6 = 010x = 6x = 6/10x = 0.6
2) (7x-28)(3x-9) = 07x-28 = 0 or 3x-9 = 07x = 28 or 3x = 9x = 28/7 or x = 9/3x = 4 or x = 3
3) 2(8x-4)(6x-9) = 02(8x-4) = 0 or (6x-9) = 016x - 8 = 0 or 6x = 916x = 8 or x = 9/6x = 8/16 or x = 3/2x = 1/2 or x = 1.5
Ответ: x = 0.6, 4, 3, 1/2, 1.5
1) 2(5x-3) = 0
10x - 6 = 0
10x = 6
x = 6/10
x = 0.6
2) (7x-28)(3x-9) = 0
7x-28 = 0 or 3x-9 = 0
7x = 28 or 3x = 9
x = 28/7 or x = 9/3
x = 4 or x = 3
3) 2(8x-4)(6x-9) = 0
2(8x-4) = 0 or (6x-9) = 0
16x - 8 = 0 or 6x = 9
16x = 8 or x = 9/6
x = 8/16 or x = 3/2
x = 1/2 or x = 1.5
Ответ: x = 0.6, 4, 3, 1/2, 1.5