Ответ на вопрос
1) 3(4-5x) = 12 - 15x
(6x+4)5 = 30x + 20
12 - 15x = 30x + 20
-15x - 30x = 20 - 12
-45x = 8
x = 8 / -45
x = -0.177777777782) -7(-5+3x) = 35 - 21x
(-4-x)3 = -12 - 3x
35 - 21x = -12 - 3x
-21x + 3x = 35 + 12
-18x = 47
x = 47 / -18
x = -2.611111111113) -(3+x) = -3 - x
(-5*(-4x+9) = 20x - 45
-3 - x = 20x - 45
-x - 20x = -45 + 3
-21x = -42
x = -42 / -21
x = 24) -5*(-4x-2) = 20x + 10
-(3+x) = -3 - x
20x + 10 = -3 - x
20x + x = -3 - 10
21x = -13
x = -13 / 21
x = -0.619047619055) 4(6-3x) = 24 - 12x
(-5x+2x)6 = -3x*6 = -18x
24 - 12x = -18x
-12x + 18x = -24
6x = -24
x = -24 / 6
x = -46) (3x-4)7 = 21x - 28
-11(22*-3) = 242
21x - 28 = 242
21x = 242 + 28
21x = 270
x = 270 / 21
x = 12.85714285717) -3(-5-3x) = 15 + 9x
6(-9x-4) = -54x - 24
15 + 9x = -54x - 24
9x + 54x = -24 - 15
63x = -39
x = -39 / 63
x = -0.619047619058) (-2x-5)9 = -18x - 45
(-1+3x)4 = -4 + 12x
-18x - 45 = -4 + 12x
-18x - 12x = -4 + 45
-30x = 41
x = 41 / -30
x = -1.366666666679) -6(3-x) = -18 + 6x
(12-13x)2 = 24 - 26x
-18 + 6x = 24 - 26x
6x + 26x = 24 + 18
32x = 42
x = 42 / 32
x = 1.312510) 2(-4x-7) = -8x - 14
-(6x+3)4 = -24x - 12
-8x - 14 = -24x - 12
-8x + 24x = -12 + 14
16x = 2
x = 2 / 16
x = 0.125Некоторые ошибки были обнаружены в вашем решении.
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