а) 2(5x-4)-3(10x-3) = 1010x - 8 - 30x + 9 = 10-20x + 1 = 10-20x = 9x = -99/20
б) -4(0.5x-2) - 3(0.4x-3) = 9-2x + 8 - 1.2x + 9 = 9-3.2x + 17 = 9-3.2x = 7x = -73/3.2
в) -3(0.6x-0.8x-x) = -3(-0.2x) = 0.6x = x = 0
г) -5(1/3x-1/25x-1/50x) = 1/5-5(25/75x-3/75x-1/75x) = 1/5-5*(21/75x) = 1/5-105/75x = 1/5-7/5x = 1/5x = -5/350 = -1/70
д) 0.5(0.4x-0.5) - 0.3(0.2x-0.4) = 40.2x - 0.25 - 0.06x + 0.12 = 40.14x - 0.13 = 40.14x = 40.1x ≈ 286.64
Ответа) x = -99/2б) x = -73/3.в) x = г) x = -1/7д) x ≈ 286.64
а) 2(5x-4)-3(10x-3) = 10
10x - 8 - 30x + 9 = 10
-20x + 1 = 10
-20x = 9
x = -99/20
б) -4(0.5x-2) - 3(0.4x-3) = 9
-2x + 8 - 1.2x + 9 = 9
-3.2x + 17 = 9
-3.2x = 7
x = -73/3.2
в) -3(0.6x-0.8x-x) =
-3(-0.2x) =
0.6x =
x = 0
г) -5(1/3x-1/25x-1/50x) = 1/5
-5(25/75x-3/75x-1/75x) = 1/5
-5*(21/75x) = 1/5
-105/75x = 1/5
-7/5x = 1/5
x = -5/350 = -1/70
д) 0.5(0.4x-0.5) - 0.3(0.2x-0.4) = 4
0.2x - 0.25 - 0.06x + 0.12 = 4
0.14x - 0.13 = 4
0.14x = 40.1
x ≈ 286.64
Ответ
а) x = -99/2
б) x = -73/3.
в) x =
г) x = -1/7
д) x ≈ 286.64