Пошаговое объяснение:
1.
5 – 4х = 7 – 5х
5x - 4x = 7 - 5
x = 2
2.
6(2х – 3) + 4 = 10
12x - 18 + 4 = 10
12x - 14 = 10
12x = 10 + 14
12x = 24
x = 24 : 12
x = 2
3.
7х – 4 = 4(2х – 7) + 2х
7x - 4 = 8x - 28 + 2x
7x - 4 = 10x - 28
10x - 7x = 28 - 4
3x = 24
x = 24 : 3
x = 8
4.
2 – 5(4х – 7) = 3(6х + 5)
2 - 20x + 35 = 18x + 15
37 - 20x = 18x + 15
18x + 20x = 37 - 15
38x = 22
x = 22 : 38
x = 11/19
5.
3х – 6(5х + 2) = 4 – 5(3х + 4)
3x - 30x - 12 = 4 - 15x - 20
-27x - 12 = -16 - 15x
27x - 15x = 16 - 12
12x = 4
x = 4 : 12
x = 1/3
6.
–11(x – 2) + 2(3 – 2x) + 15x = 0
-11x + 22 + 6 - 4x + 15x = 0
28 ≠ 0
нет решений
-6x+10x=-3-5
4x=-8:4
x=-2
6(2x+5)-8x=2
12x+30-8x=2
4x=2-30
4x=-28:4
x=-7
3+4(5x-3)=4x+7
3+20x-12=4x+7
20x-4x=7+12-3
16x=16:16
x=1
3(5x-7)-7(4x+5)=x
15x-21-28x-35=x
-13x-x=56
-14x=57:(-14)
x=-4
2(6x-5)-7(3x-5)=4x-1
12x-10-21x+35=4x-1
-9x-4x=-1+10-35
-13x=-26:(-13)
x=2
-12x+4(x-3)=-8x-12
-12x+4x-12=-8x-12
-8x+8x=-12+12
0x=0
любой корень
2(4x-5)=2x+8
8x-10=2x+8
8x-2x=8+10
6x=18:6
x=3
3x-10=5x+2(4x+5)
3x-10=5x+8x+10
3x-13x=10+10
-10x=20:(-10)
x=-2
6x-6(2x+5)=4(5x-1)
6x-12x-30=20x-4
-6x-20x=-4+30
-26x=26:(-26)
x=-1
11-4(3x-1)-5(4x-3)=3x
11-12x+4-20x+15=3x
-32x-3x=-30
-35x=-30:(-35)
x=6/7