Ответ:
Пошаговое объяснение:
1.
-6x – 13 = -7x – 14
7x - 6x = -14 + 13
x = -1
2.
5x = 8 + 3(2x + 3)
5x = 8 + 6x + 9
5x = 17 + 6x
6x - 5x = -17
x = -17
3.
3(4x + 1) + 3x = 2x – 23
12x + 3 + 3x = 2x - 23
15x + 3 = 2x - 23
15x - 2x = -23 - 3
13x = -26
x = -26 : 13
x = -2
4.
7(2x - 5) – 4(5x + 3) = -33
14x - 35 - 20x - 12 = -33
-6x - 47 = -33
6x = -47 + 33
6x = -14
x = -14 : 6
x = -2 1/3
5.
6x - 7(3x – 5) – 2(4x – 7) = 3
6x - 21x + 35 - 8x + 14 = 3
-23x + 49 = 3
23x = 49 - 3
23x = 46
x = 46 : 23
x = 2
6.
12(x - 2) - (4x – 3) = 8(x + 3)
12x - 24 - 4x + 3 = 8x + 24
8x - 21 = 8x + 24
8x - 8x = 24 + 21
0 ≠ 45
уравнение не имеет корней
5/8=15/24
ответ: 17/24>15/24
А) х = 112 : 4 х = 28
б) у = 133 : 19 у = 7
в) т = 90 х 15 т = 1350
120-9^2/3=93
(120-9^2)/3=13
(120-9)^2/3=4107
120-9/3^2=118.5
-2 1/2*(-2 1/2)*(-2 1/2)= -5/2*(-5/2)*(-5/2)=-25/4*(-5/2)= -125/8