Пошаговое объяснение:
8x - 3(2x - 3) = 7x - 2(5x + 8)
8x - 6x + 9 = 7x - 10x - 16
2x + 9 = -3x - 16
2x + 3x = -16 - 9
5x = -25
x = -25:5
x = -5
14(2x - 3) - 5(x + 4) = 2(3x + 5) + 5x
28x - 42 - 5x - 20 = 6x + 10 + 5x
23x - 62 = 11x + 10
23x - 11x = 10+62
12x = 72
x = 72:12
x = 6
(9x - 6)/2 - (8 + 3x)/3 = -1 (*6)
3*(9x - 6) - 2*(8 + 3x) = -1 *6
27x - 18 - 16 - 6x = -6
21x - 34 = -6
21x = 34 - 6
21x = 28
x = 28 : 21
x = 1 1/3
(x - 2)/6 + (x - 1)/15 = 3 - (3 - x)/12 (*60)
10*(x - 2) + 4*(x - 1) = 3*60 - 5*(3 - x)
10x - 20 + 4x - 4 = 180 - 15 + 5x
14x - 24 = 165 + 5x
14x - 5x = 165 + 24
9x = 189
x = 189:9
x = 21
4 - (2x - 3)/5 = (4x - 15)/4 (*20)
4*20 - 4*(2x - 3) = 5*(4x - 15)
80 - 8x + 12 = 20x - 75
92 - 8x = 20x - 75
20x + 8x = 92 + 75
28x = 167
x = 167:28
x = 5 27/28
3x - (6x + 2)/3 = (2x + 7)/5 (*15)
3x*15 - 5*(6x + 2) = 3*(2x + 7)
45x - 30x - 10 = 6x + 21
15x - 10 = 6x + 21
15x - 6x = 21+10
9x = 31
x = 31:9
x = 3 4/9
x=11.
Пошаговое объяснение:
3x-2(5+x)=1
Раскрываем скобки:
3x-10-2x=1
Приводим подобные слагаемые:
3x-2x=1+10
x=11